Hi @imhere, it looks like you've installed the flat pack or snap version of Joplin. This issue has come up before and at the time there was no (complete) resolution for it.
Essentially, the problem is that Linux desktops have many competing package formats, and Joplin only uses one (AppImage). There are a few packages created by third parties, so they have control over things like auto update.
If you share how you installed the Joplin app, then someone on the forum might be able to help you. But in general the third party packages are not supported by the Joplin team, and you'll need to talk to the packager to get help.