Rear-view mirrors hit

Hello dear fiat forum, I come normally from the bmw e90 forum and have a question to you. I have cut an old s*** in a narrow 30’s zone to the extent that I had to avoid a frontal collision and drove a fiat bravo bj 2010 with approx.20kmh against the left outside mirror. the mirror has folded in the opposite direction (i.e. the opposite direction as if you clapped it with the hand) and a plastic cover is removed. I have found the keeper and have looked, the mirror you could fold in normally again and put the plastic cover under the mirror again on it. everything is absolutely fixed and does not shake and has no scratcher or glass break. my car also has only a mini scratcher on the mirror. her mirrors are heatable. she still wants to have it checked in the workshop and that. I will not calculate it about the insurance. what do you think, which harm there is you think I still have to pay a rental car? would be cool if you could help me. many greetings from the bmw forum