Just sent my MR for dozing support:
https://gitlab.gnome.org/GNOME/gnome-settings-daemon/-/merge_requests/324
Related content:
https://gitlab.gnome.org/gnumdk/dozed
https://gitlab.gnome.org/gnumdk/gnome-clocks/-/commit/60a3685a8c37ad8e103f2309535cdf29ce1f026c
https://gitlab.gnome.org/GNOME/geary/-/commit/344c6ad773cbb4c37d0a5929fc99e785334b0393