I’ve also had timing belt issues with my Q2 . The bolts came loose - it’s 6 years old but has only done 30000 miles .
On a much more dangerous note in September there was a problem with one of the fuel injectors and a whole tank of petrol schooshed into the engine . It could have gone up in a ball of flames at any point. Audi were not remotely interested in doing anything about it because it was out of warranty.
Very luckily I am still alive!