I don't see an External Organization to switch to on the Mac Desktop App, but see it on the Web App

I am have been made a guest in Teams for several organizations with whom I work. However, my desktop app does not reflect the correct organizations and I cannot access one of the organizations from the desktop app, only on the web app.

I should be connected to three external organizations on Teams. I can see those three on the web app and access all of them. However, on the Mac desktop app, I do not see the one that I was recently added to and I do see an organization that I left a long time ago still appearing.

I have tried signing out of all devices from my Microsoft account and signing back in. I have uninstalled the desktop app and reinstalled it. That doesn't work either. I just want to be able to access this new organization from the desktop app and currently the only way I can access it is from my browser.

HALP!