This post is related to multiple devices all running on ios 15.2.1 The devices are iphone SE 2020, iphone 11 pro max and iphone 13 pro max. The issue is related to multiple games as well - pubg mobile, call of duty mobile and free fire. I use the original apple earphone with the mic in the cable connected to the phone via the lightening port. I do not use any other app in background like for recording etc. Now, the issue is pretty simple i.e. the game volume turns drastically low when the in-game mic is turned on. This issue is the same for all the devices and games I mentioned earlier.