Bluetooth earphones connected, but sound doesn't go through them

Seems you have both PulseAudio AND Pipewire active! This shouldn’t be the case. How did you activate PipeWire?

I suggest using:

sudo pacman -Syu manjaro-pipewire

You might need to follow up with

sudo pacman -Rns pulseaudio-ctl

… but try without first?

N.B. I have had an issue with a Mifa earbud set connecting to Bluetooth but not showing as an audio device in settings etc. — in my case, “forgetting” the device and re-pairing fixed it, for a while anyway.