Can we use Ubuntu 22 with only Sametime 12.0.1 Chat and not Premium?

The reason behind asking this question is the way HCL has listed the supported OS for Sametime. In the List is shows RHEL and CentOS with Premium and Chat versions of Sametime. Ubuntu only shows Premium. Is there a reason for this? Is there any foreseen issues with installing only the Chat version using Docker on Ubuntu?

Yes.

We have updated

HCL Sametime Premium and HCL Sametime 12.0.1 System Requirements

to reflect this.