Aah gotcha. I don’t remember exactly. I was using HA a year ago for about a month just to test around, but my home doesn’t have any smart devices so I got rid of it.
But as far as I remember, it was something in the HA settings itself (probably in the admin account or in the map). Just give location access to HA mobile app and it should work perfectly.
If you don’t want to pay Immich for backups, you can take care of off-site backups yourself using tools like rclone to your hard drive or any off-site storage of your choice. A paywall here would be not allowing offsite backups at all unless you pay Immich.