MarsSeed [1] filed a deletion request for gnome-shell-extension- volume-mixer [2]:
Upstream is abandonware (last change was 2 years ago), and does not support GNOME > 41. I recommend the actively maintained AUR/gnome-shell-extension-quick- settings-audio-panel as an alternative. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gnome-shell-extension-volume-mixer/
