Okay. It seems not because of volume function.
Are you trying to play with some other plugins such as Spotify? If so, please try with the tracks located in the local library at frist.
With Spotify plugin, please revise the file as below and then reboot:
$ cd /data/plugins/music_service/spop
$ cp volspotify.tmpl volspotify.tmpl.bak
$ nano volspotify.tmpl
...
[Output]
#device = '${outdev}'
device = 'bluealsa'
...
I have confirmed with the latest combination of volumio 3.324 and Spotify plugin 3.0.6.
additonal edit:
before we go further, please try the fundamental command to check if playing through bluealsa works:
aplay -D bluealsa:SRV=org.bluealsa,DEV=XX:XX:XX:XX:XX:XX,PROFILE=a2dp test.wav
where XX:XX:XX:XX:XX:XX is the MAC address of the receiver device.