iPhone 13 Pro Max microphone issue

I bought a new iPhone 13 pro max a couple weeks ago. Really often, during phone calls my interlocutors say my audio is "noising", don't catch my words or say my words are cut. In 80% of my calls, the other side tell me: "Please, may you repeat it?". If I use my AirPods I haven’t any issue.

At genius bar said my microphone works fine. The problem is caused by the missing noise reduction feature for iPhone 13.

Anyone got the same issue and solved it?

Just a note: I know noise reduction works on speakers. It works on microphone too?

I’m really upset about it: I bought a really expensive phone, but I can’t use it for phone calls!