That works but there are times where a machine/service dies completely or hangs mid-process for a couple of days. You can account for a lot of those cases, but having a separate system that just looks for success rather than monitoring for failure works betters in my experience.

Or if you just want notifications, ntfy is really nice and selfhostable.

I’d recommend using a job monitoring service that will alerts you if it doesn’t get a check in. It’s very useful if your backups fail silently or hang mid-job for some reason.

I use https://healthchecks.io/ since it has a free tier and it works well.