Here’s one suggestion.
Zwift transparency (ZADA) is doing a great effort to check and verify users profile, race classifications, riders efforts, asking for dual recordings, weight videos etc…to ensure that the results are reliable and the athletes are competing honestly.
But after these checks, if they conclude that everything is fine, they should mark that athlete with some kind of tag or clean passport. The tag could have a validity period of 3 months for example or an associated verification date.
This simple idea would allow the other athletes not to doubt the verified athlete and his results and, on the other hand, to demonstrate that the zada is working and try to ensure that the platform is clean.