Sergey, your configuration file is working and audio is heard
from qutebrowser on this system.
Internet searches surfaced commands like these,
`pw-cli`
`strace -e connect pw-dump >/dev/null`
Error messages were seen relating to socket files not found,
`$XDG_RUNTIME_DIR/pipewire-0`
`$XDG_RUNTIME_DIR/pipewire-0-manager`
Various things attempted, but the socket files missing every
time sway started
Finally, tried removing the pipewire-starting parts of the sway
config
```
# exec_always killall -wqr "(pipewire|wireplumber)" \
# || sleep 1 && ((pipewire &); sleep 2 && (wireplumber &))
```
Then separately started pipewire and wireplumber "manually" from
the shell. The
socket files were created and when qutebrowser sound could be
heard.