Also worth mentioning this is on release 24.60 - no vibrant visuals on existing worlds
This also happens for pre-existing worlds that doesn’t use education edition too - although newly created worlds are unaffected
I have had the exact same issue - but on Xbox Series S - although vibrant visuals works on newly created worlds, since this update 26.40 my existing worlds have disabled all vibrant visuals and will not allow me to select it saying ‘my device isn’t compatible' although it is
Do you have education edition enabled? I turned it off and it seems to have unblocked vibrant visuals - either way it needs fixing lol