Missing sensor(s): mic1 \nservice: backboardd,

@kabeerbaap Kabeer, you should replace the charging port flex cable assembly. This is where the microphone is located and is the most common cause for failure.

However, sometimes even after replacing the charging port the problem is still there. As @flannelist has previously pointed out, there is a defect in the SE 2020 design that results in the signal being lost under the SIM card tray requiring precise and difficult logic board repairs. Here's the guide to replacing the lightning port assembly.

iPhone SE 2020 Lightning Connector Assembly Replacement - iFixit Repair Guide

Jesse Cruz has a video showing how to diagnose the problem if it's a motherboard issue.

How To Fix an iPhone SE 2 (2020) That Restarts Every 3 Minutes. Panic Log Mic1 Error. Long Jumper - YouTube

If you have the skills, you could definitely try to diagnose the issue first; otherwise you'd be best off replacing the charging port first then seeing if the problem is still there. On most iPhones, the charging port would fix the issue 95% of the time, but on your phone the odds may be more like 50%, but it would still be worth doing as the replacement part isn't all that expensive; certainly much less than the cost of having the board repaired.

Good luck and let us know what you find and how it turns out!