iPhone lightning earphone noise.

I’m currently using iPhone 12. I hear noise (popping sound/clicking sound) whenever I pause a video or change between apps. Even I hear the sound when I bring up keyboard to type something. Even when I’m surfing in youtube and stop randomly playback in feeds starts and I hear the noise/sound. This sound is really low, can only be heard in quite environment but trust me it’s super annoying. I tried official apple lightning earbud, official lighting to 3.5mm earphone adapter and also MFi certified UGREEN lightning earphone with three different iPhone models, one is iPhone 7 and other both are iPhone 12. I did all possible things to solve the issue but I failed. Even did a complete restoration of software but the problem is not solved. I’m requesting Apple to solve the issue asap. Thank you all for having patience and reading this far.