Different batteries usage in both AirPods when they're connected to a non Apple device (Lenovo T470 - Ubuntu 18.04) and then switch to iPhone 11 Pro. Haven't noticed if I use APP
How to Fix AirPods not Working on Ubuntu - TechWiser
Pair AirPods with Linux Ubuntu - cri.dev
Connecting my AirPods on Ubuntu 22.04 with PipeWire | jkfran