this engadget article had some screenshots: https://www.engadget.com/social-media/threads-is-making-fediverse-replies-more-visible-in-its-app-194543494.html
Those would seem to show it is a list and does include the domain.
Vesipeto Vetehinen /
npub17w…f7cz9
2024-08-28 22:36:10
in reply to nevent1q…sjzd
Author Public Key
npub17wrnwmzqac8lfkc2p6nqk8vqag27xezdugpa5h7eh9c6yrf0xwrqsf7cz9Published at
2024-08-28 22:36:10Event JSON
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