Hi Marius, it looks to me like you just need to replace a bulb or two to get things working again. I could be wrong, it wouldn't be the first time.
I found this thread on Audiworld, if your problem gets worse it might be worth a check
https://www.audiworld.com/forums/q7-mkii-discussion-211/audi-q7-2018-ambient-lightning-problem-3014417/