Your home server’s data isn’t backed up unless you have an offsite storage solution.
If you’re running a home server, you probably already have your devices backing up their data to your storage pools. But that’s not the only place you should be storing backups, as the 3-2-1 backup rule means you should have one copy of your data at an offsite location. That could be a cloud storage service or a physical machine that’s further away than your garage, but for any truly important data, it’s a necessary cost to keep it safe.