Poly and Zoom Rooms

Specifics matter - what are you actually trying to do?

For audio? Absolutely not.

For video, yes - depending on what you're trying to do. The 'bars' (please specify exact model so we're on the same page) will not auto-switch (I assume you're referring to Huddly crew, which can do this with 3-5 cameras).
You can absolutely configure 2 'bars' (Studio X30, X50, X70, X32, X52, X72) with one as the primary Zoom room and one as a "Companion Zoom Room", but this will effectively add a second camera and set of video outputs, not much else.

https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0057777

Certain Poly cameras - not 'bars' - can be configured to run Zoom's Intelligent Director multi-cam mode, a terrible implementation of multi-cam that was teased for several years before its lackluster release. Cripples optical-zoom PTZ cameras into static digital-zooming garbage with all cameras coming from only a single direction. Needless to say, I don't recommend this option.

https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0057795