Will Forza Horizon 6 be on PS5?

There is no reliable confirmation I can give that Forza Horizon 6 will be on PS5. If it has not been officially announced for PS5 by Xbox, Playground Games, or Turn 10/Microsoft, treat any PS5 listing or rumor as unconfirmed.

The practical expectation is: it could happen, especially because Microsoft has been bringing more Xbox-published games to PlayStation, but you should not assume a PS5 version until the official platform list is published. If Forza Horizon 6 is announced, check the official Forza/Xbox announcement page, PlayStation Store listing, or trailer end-card for platforms.