Hello @bvv4ik
RTMS would need to be enabled on your account. If you are looking to test with RTMS please see our steps highlighted in this post and submit your information in this form - Zoom Realtime Media Streams | Zoom and we will enable it for the account you share.
If you are interested in speaking with our sales team regarding purchasing RTMS please include that in the form as well.
Thank you
Joan