I had that at one point too, was really obnoxious. A couple fixes:
Bluetooth, including possibly a Bluetooth-to-phone-jack adapter if you have headphones with a phone jack that you’re happy with.
USB-C audio interface that has better power circuitry than the phone’s DAC. You will need one that can pass through USB PD to charge your phone simultaneously.
I had that at one point too, was really obnoxious. A couple fixes:
Bluetooth, including possibly a Bluetooth-to-phone-jack adapter if you have headphones with a phone jack that you’re happy with.
USB-C audio interface that has better power circuitry than the phone’s DAC. You will need one that can pass through USB PD to charge your phone simultaneously.