Previous versions of the sxmo-common package (<1.6.0-7) erroneously added polkit to the openrc default runlevel. This is not actually necessary since polkit is started automatically by dbus later in sxmo_xinit.sh and sxmo_winit.sh. As a result, openrc reports that the polkit service has failed to start:
# cat var/log/messages | grep polkit
2021-12-03 03:57:57 info polkitd[3443]: Started polkitd version 0.119
2021-12-03 03:57:58 warning supervise-daemon[3108]: /usr/lib/polkit-1/polkitd, pid 3443, exited with return code 0
2021-12-03 03:57:58 info supervise-daemon[3453]: Child command line: /usr/lib/polkit-1/polkitd --no-debug
...
2021-12-03 03:57:58 info polkitd[3471]: Started polkitd version 0.119
2021-12-03 03:57:58 warning supervise-daemon[3108]: /usr/lib/polkit-1/polkitd, pid 3471, exited with return code 0
2021-12-03 03:57:58 warning supervise-daemon[3108]: respawned "/usr/lib/polkit-1/polkitd" too many times, exiting
To resolve this, manually remove polkit from the default runlevel:
$ sudo rc-update del polkit
Later versions of the sxmo-common package do not add polkit to any openrc runlevels.