As for the doujins, I'll just post em all without much preface. Tried to mostly aim for cute ones, which means there's yuri but goddamnit I think yuri can be cute.
https://mangadex.org/title/caa1442c-dde0-4f83-9d23-d5dece4b7e80/touhou-rokurokubi-and-the-maiden-s-youma-book
https://mangadex.org/title/ad75c872-bd2a-459a-bb92-a2ca568640fb/touhou-anata-ni-ai-ni-kita-no
https://mangadex.org/title/b34311b3-a162-458f-bfd1-4444b4ff3575/touhou-as-a-pair-or-a-trio
https://mangadex.org/title/007af825-5ae8-47b4-8791-f8305e9b2a00/touhou-bandrinks
https://mangadex.org/title/80e9b0e1-63a1-4c4c-8ada-e05ffec61a77/touhou-fire-tower-sekibanki
https://mangadex.org/title/c51b68fa-39a2-4670-bd35-928268328a22/touhou-hello-hello-i-m-here
https://mangadex.org/title/589715a4-5bda-4983-a63f-7883768a1dc7/touhou-her-highness-humour
https://mangadex.org/title/884ea97b-87d4-459d-b968-695a487dc350/touhou-sekibanki-wa-osananajimi-ga-nigate
https://mangadex.org/title/e810f317-05e1-4280-8fc9-f072e3d2bedf/touhou-marumaru-shinmyoumaru