I found this nifty shortcut to backup all shortcuts. You can set it to an automation and do a rolling limited number of backups on a set schedule, like 10 zip files max, backed up weekly.
There’s a problem though. There’s an error on the Make Archive step.
I stripped the shortcut down to Get All Shortcuts, Make .zip of My Shortcuts. The error persists.
I’m not sure why it’s not working unless this is an existing Shortcuts bug at the moment.