Deployments are posted in the legacy explorer using a GitHub, the mainnet publisher can’t be directly connected to the publisher on the hosted network. But you can verify that the deployment_id is the same (quick way to see “is this the same code or something different. If different, why? Does GitHub have updates or is this a total fake)” this does not help identify forks.
If they have the same deployment ID you can see “did the hosted network successfully sync this data?” Which addresses a potential risk aspect.
(That’s mainly on new deployments)