Hi Chris Thanks for your report.
Actually this was an unnoticed rename of /etc/xdg/autostart/diodon.desktop to /etc/xdg/autostart/diodon-autostart.desktop when Diodon moved to the Meson Build system. I guess using the `dh_installdeb` with a `diodon.mainscript` file will be the easiest as per [0] Oliver [0] https://manpages.debian.org/buster/debhelper/dh_installdeb.1.en.html
