There are several ways to increase the volume on AirPods while on an Android device, but the most straightforward way is to disable a feature called Absolute Volume.
Unfortunately, Absolute Volume isn’t disabled by default on AirPods Pro used with Android devices. This feature prevents you from simply adjusting the volume slider to increase or decrease the volume of your AirPods while they’re paired to an Android smartphone. Instead, it forces you to use your AirPods’ buttons or the volume controls on your phone itself to adjust the volume.
Some of these settings are a little obscure, so we’re going to walk you through exactly how to turn on these developer options on your phone or tablet.
Disable Absolute Volume
Open the Settings app.
Locate and tap the “Build Number” item seven times. (If this doesn’t work, try going to Settings > About Phone > Software Information > More and tapping on Build number seven times.)
A dialog will appear warning you that this is not a good idea, but you can tap “OK” to continue.
Return to Settings and look for the new “Developer options” entry near the bottom.
Locate Disable Absolute Volume and toggle on. This should solve the low volume issue on most Android device.