If it asks you to calibrate the compass, you should do it, but not indoors. Take the drone outside and place it somewhere away from any metal (not on concrete, it has metal rebars). Then turn it on, and see if it still warn you of magnetic interference. If so, calibrate it (not close to metal, remove watch and keep your phone away). It will tell you if calibration was successful.
If DJI says you need Android 5.0, you should listen to them. Some people have had problems with Go4 and Android 12 and 13. Like I said, I run version 8 and 9 with zero problems.
More about magnetic interference:
Some
Mavic 2 Pros, including one of mine, falsely reports mag interference when there is none. I check the sensors state and they are all perfectly fine, and the drone flies like a dream. Other people, but not many, has reported the same error. I live with it now, I just check the sensors state before I take off.