I couldn’t find this information when searching, so I’m sharing it here.
LogseqDB loads in the browser, and has the ability to create hourly backups, but if you are using Brave Browser this feature (accessed via the export screen) is disabled.
To enable it, go to brave://flags/ and search for native file system API.
After enabling it, restart Brave, and re-load the export screen in logseq. You will now be able to set up regular backups.