I don't use over-amplification (it's disabled) and system volume level is about 50% most of the time. The issue was on Solus Budgie X11. Can't confirm it on Budgie Wayland.
The problem I had is that at my usual listening volume set in the system and in the music player app, music was playing at very low volume.
It's could be related to pipewire/wireplumber config on Budgie..