Didn't spot this in todays patch notes but after logging back into Dovetail Live after todays patch the overlays for my completed mastery rewards are finally showing up. I'd not completed these prior to upgrading to PS5 so I'm quite excited. I'm off to go find a UFO!
Excellent news. I'd unlocked loads but not been able to activate any of them! Looks like all the additional elements have finally appeared in the livery editor too.
Checked this out earlier on PS5 and yep, the 3 routes I've completed mastery for now have their overlays. Battersea power station looks quite good at night now.