Hi Radek,
> I discovered that the issue has nothing to do with xdg-desktop-portal.
> Other D-Bus activated services also does not start.
Does this help?
Note: The user configuration is expected to contain include
/etc/sway/config.d/* in order to apply configuration snippets from
drop-in files. The sway package provides the 50-systemd-user.conf
drop-in file, which imports several environment variables into the
systemd user session and dbus. This is required for several
applications such as xdg-desktop-portal-wlr.
— https://wiki.archlinux.org/title/Sway#Configuration
--
Cheers, Ralph.