Teams app for MAC M1 - Public preview not available

Hi,

I have a Mac M1 and Teams Mac app version 1.5.00.24264.

My organization has enabled the Public Preview for all users.

In the past, I was able to change the Mac App to set "Developer Preview" or "Public Preview" in the About menu, but it looks like this is not possible anymore.

Am I missing something I should do to activate the preview?