New images taken with Camera app (I tested both MIUI Camera and a third party app) aren't adding to Google Photos, seems to be an issue related with the new storage permissions.
I have the same issue with a certain camera app, I know xiaomi.eu doesn't support other apps, but when the issue comes from the rom itself, it's something to look into. I noticed that video previews work fine, it only affects photos.
New images taken with Camera app (I tested both MIUI Camera and a third party app) aren't adding to Google Photos, seems to be an issue related with the new storage permissions.