[assbuttbuttass]

> I don't know how to configure users to be able to maintain their own (personal) units.

This is something I use all the time! Just put unit files in ~/.config/systemd/user and use systemctl --user to start/enable them

https://wiki.archlinux.org/title/systemd/User

[isignal]

Just a note that this requires the admin to enable linger if the units need to be started before the user logs in and run after they logout.