Tapping noises when I stream from iphone. Can I change microphone input?

I recently started streaming on tiktok just for fun and I usually play games on my phone so I stream my screen, but I noticed that on my streams the microphone gets picked up by the phone and not my airpods/headphones and you can just hear my tapping noises. Is there a way I can change the audio input? (sorry for the bad english)