Hello, the Zoom client appears not to currently be installable on EL9 distros as the GPG key is signed using SHA-1, which is deprecated in these releases. So at a minimum in order to support them, Zoom will need to publish a new GPG key which uses a stronger hash algorithm.
Zoom devs, please fix this. Thanks!
Relevant support article from Red Hat (login required to view full article)
https://access.redhat.com/solutions/6868611