Have just downloaded the latest version of RA on the Nintendo Switch which use the new Ozone UI, i have downloaded the thumbnails for the NES via the updater and told RA to show the thumb nails but im not see any thumbnails at all, is there another step i need to do or is it just not working on the Switch version currently ?
Can thumbnails even been display with Ozone, as i dont seem to have the game collection tab anymore?
I don’t think Ozone supports thumbnails currently, no. I’m not 100% sure on that, though, as I don’t use thumbnails/boxart/whatever.
Update: Ozone now displays thumbnails.
Confirmed 
This appears to be new to v1.77 