I have never found that setting. I wonder if its not included in their linux version, or perhaps, like Teams, it requires a newer CPU than what I have, so its not shown.
I'm using an i7-9700k so it's not a lack of cpu power.
edit: Maybe there's a newer version that supports green screen? The options simply don't exist in my version.
>Linux:
>· Zoom Desktop Client for Linux, version 2.0.91373.0502 or higher
>· Dual Core 2Ghz or Higher (i5/i7 or AMD equivalent) processor
>· A physical green screen