So you can enable it and then run:

sudo fwupdmgr get-updates

And you will get a list of what would be updated with the testing repo, and then you can disable it again if it doesn’t return a result that one can work with.

You could try enabling the lvfs test-repo

sudo fwupdmgr enable-remote lvfs-testing

And the run

sudo fwupdmgr update

I took a look at Logseq, and probably switching from Obsidian to that.