Microphone Doesn’t Work on FaceTime / Calls but works on Voice Memos

Basically, my iPad microphone doesn’t work on calls, but it works when I’m using voice memo or recording videos and yes, I have tried cleaning the speaker, but it still doesn’t work, and people say they can hear me a tiny bit and not fully and I have tried restarting my Tablet, but it still doesn’t work. Basically doesn’t work when I’m actively using it.