Phosh 0.55.0 is here!
Be careful, pfs-common should be installed manually in case of error during apt dist-upgrade.
Also, do not forget about phosh-session-services and fix NoDisplay=true in /usr/lib/aarch64-linux-gnu/phosh/plugins/syncthing-quick-setting.plugin to check integrations with syncthing!
p.s. also pay attention to make backups and/or have working dual boot.