1000000000% YES!
The Law of One put me onto learning about Tarot but only the 22 major arcana and not for divination. Per the Law of One, Ra created the Tarot as more of a manifest or a user's manual like what might come with a Swiss Army Knife or some gadget. The 7 mind, body, and spirit cards are meant to inform us of what lies within us all awaiting manifestation.
Here's how I see Tarot playing in perfectly to the sarcophagus thing.
I searched the Law of One for the word sarcophagus and got one hit: 80.20.
Note that the question is asking about Tarot card #20. I have a Tarot book...a few Tarot books actually, but I refer primarily to one: Kabbalah Unveiled by Imre Vallyon. I like his style of connecting the dots across traditions. He references Gnosticism, Sufi Mysticism, Hinduism, Buddhism, and all sorts of traditions. It's a Kabbalah book but 4/7 of its ~350 pages are covering the 22 cards of the Major Arcana.
Anyways, so I see that Ra mentions the sarcophagus in the context of Tarot Card #20. I also notice that Ra seems to be saying that the sarcophagus is connected to the realization of the immortality of the soul as being one of the illusions that falls away in the steps of adepthood.
I flip to the part about Tarot card #20 in my book. They call it "The Great Awakening"...boom...immediately I'm thinking about kundalini awakenings here, especially on card 6 of 7 of the spirit cards.
For one thing, Tarot card #20, in my book, has sarcophagi on it, a male, a female, a child, and a winged angel sounding a trumpet triumphantly. The sarcophagi seem to be floating in a body of water (occult blind most likely...reverse that and the water is inside the sarcophagi as I would have expected). Lastly, this book calls the form of intelligence that this card offers "perpetual intelligence". Sounds a lot like knowledge of reincarnation and or access to intelligent infinity via the activation of the wisdom chakra.
To me, in a nutshell, this is a representation of the triumphant rejoicing of the angels in heaven at the birth of a new Divine Child...a new angel. This Divine Child has united the Divine Masculine with the Divine Feminine. You already know what I think the sarcophagi and the water outside of them are about.
On top of all that imagery, we have then the first sentences of the section which read "Tarot Key 20 has to do with the greatest mystery of your existence, and that is death. This Tarot Key covers the Awakening through death into Eternal Life."
OK, so that sounds like it's talking about knowledge of reincarnation and the eternality of the soul as a realization. I believe there is another layer here though and it has to do with the etymological origin of death: da'ath.
On Kabbalah's Tree of Life, there is a void in the center column just below the top Sephirah, Kether/Keter. That void is where the hidden Sephirah, Da'ath, is located. Da'ath corresponds with Gnosis in the Gnostic tradition. It corresponds with Vishuddha in the Hindu tradition. It corresponds with djinn due to the etymological connection between "genuine" and djinn and the requirement of honesty in communication to activate the wisdom chakra.
A concept associated with kundalini awakenings is the "dark night of the soul". I speak of this period as being the period of time after a kundalini awakening during which one is stripped of that which one never truly was. One example is my obsessive attention paid to professional sports. I dropped that real fast after my awakening happened in 2018.
This is an important concept in context with da'ath which again seems to clearly be the etymological origin of our word death. If achieving Gnosis, activating Vishuddha the wisdom chakra in the throat, etc. is like the old you dying and a new you being "born again", rising from your own ashes like the Phoenix, you can begin to see how many religious and mythical stories turn out to be legends of kundalini awakened geniuses.
So, when I see that this card is about death, my "occult blind radar" starts beeping and I cannot help but try substituting out the word death and substituting in the word da'ath in that same context and it works both ways.
If I go one step deeper, James Churchward's book "The Lost Continent of Mu: the Motherland of Men" on page 135 says "In the Temple of the Great Pyramid there was found a sarcophagus with the emblems of MORTALITY arranged alongside it. The adept was placed in the sarcophagus to remind him of what he must eventually come to, and when he emerged from the sarcophagus he was reminded that after his soul left his mortal body, another life awaited him."
Churchward's work (from about 100 years ago) demonstrates that adepts were put into the sarcophagi. He clearly is talking about reincarnation. Also, we have the "emblems of mortality" which immediately makes me think about da'ath as well which is one of the 3 higher chakras to be activated (crown is always active).
On page 304 of Churchward's book, he says "Having passed through the portal, he was conducted down these passages by a friendly spirit that he could not see, and was taken to the place of initiation, where his Manes were regenerated by the descent of the Soul to the expecting postulants. He was then conducted to the CHAMBER OF CENTRAL FIRE, which he extinguished."
Churchward continues, quoting the Egyptian Book of the Dead, Chapter XXII:
"'I come; I do that which my heart wishes on the day of the Fire, when I extinguish the flames as soon as they appear.' And Chapter XXV.--
'I make the man remember his name in the Great House. I make him remember his name in the House of Flame.' References to the Tank of Fire are constantly met with throughout the Book of the Dead and are generally accompanied by the foregoing glyph or vignette.
Churchward notes that figure 11 is the Ka. Ka is found in both Kabbalah and Merkabah. Ka is the Divine Masculine. Per the Hindu tradition, the Divine Masculine (Shiva) resides in the Crown Chakra and the Divine Feminine, Kundalini Shakti, is coiled 3.5x around the Root Chakra. Our goal is to reunite Shakti with Shiva. Shakti is the one who moves up Sushumna to the Crown, making the Crown an "end point" of sorts within a greater process. Since the end point is associated with the Divine Masculine, it may make sense why the skull and bones of a physically deceased person might be used as a symbol for enlightenment, given the whole "da'ath and rebirth" thing.
Churchward has it. Tarot cards have it. Law of One has a flush in every suit in the deck and then some.