Earpeace speaker not working, even after replacement.

Hi, first off i'm aware that this question has basically already been asked, and I had posted a question/comment on there, but it seems like nobody will get redirected there, since it is marked as solved, so here's my problem:

I ordered and changed my ear speaker for my 13 pro max because it was super quiet and hadn't gotten better even after cleaning it. After i replaced it didn't work as all anymore.

Going back to the old original post asking this same question; someone commented to replace the WLAN card because that is the connecting piece for the ear speaker to connect to the logicboard. I followed those steps, ordered a new one and am still having the same isse.

My questions are: what other functions run through the WLAN card that I could test to see if the connector to the WLAN card might be the issue?

And if I am able to diagnose the card either as working or not, what would be the next best step to get the phone fixed? What kind of repairshop can fix or diagnose things like this on a deeper level, and how likely is it that its an issue with the audio chip or something else thats harder to fix. And is it even possible to fix this?

Any help is incredibly appreciated!

AJ