Does e/OS come with a backup app installed ?
it does, but it’s hidden (in some versions?) last I checked - and outdated. It should be slated for a comeback sometime this year according to the roadmap though. For Aegis specifically, the outdated version will do its job still once you activate vault encryption, this is what allowBackup=true is about. If you’ve setup the full nextcloud client you can have remote backups of Aegis.