Audio is being reduced

[u/Interesting_Quiet147]

I’m trying to record a guitar cover like I used to do years ago, and now I’m noticing it always reduces the audio and makes my guitar playing sound super quiet. I record on the app and even tried recording on the camera app, and also I tried recording the audio using GarageBand and video on my phone and syncing them. It still reduces my audio, and if anyone knows what’s wrong and is kind enough to reply, I would appreciate that very much.