You mean warnings on itch.io game pages, generated by the server? I wonder where those could come from.
Viewing post in Some Feature requests for the website.
https://itch.io/t/1659440/psa-beware-the-try-my-game-scam
On itch.io, it is safe to view the page, but do not download any untrusted software
The psa is two years old and with the growth of itch it is even more important and current.
Being hosted on itch is not in any way a green flag to consider software as trusted. I seen scams here that were years old. The page quarantine only works for direct links. I see indexed and thus not quarantined scams here every week, published on hacked accounts.
Itch is not a safe place to download games. Strictly speaking, that warning about untrusted software should be displayed for every download