This is not a Poly issue - but it definitely might affect Poly Devices. I've stumbled onto an issue in my tenant - not sure if it's in others - where I am creating Room Resources and they are not auto-accepting meeting requests. I troubleshooted this - and went so far as to review PowerShell scripts with Microsoft with no success.
And then I found the workaround. Resource creation was not working correctly when creating the resource in the M365 Admin Console. But if I created a resource in the Exchange Online console, the recourse was created correctly including automatic processing of meeting requests.
So - something is preventing the correct provisioning of the resource depending on which console does the creating. Not good and not documented. It might only be in my tenant - not sure. We are doing more with Defender ATP and Cloud Defender, etc. So that might be the difference. Don't know.