Having configured two standalone Horizon pods, what steps should be taken to join them in a Cloud Pod Architecture (CPA) deployment?

A new Horizon environment has gone into production. External sessions are being disconnected after a random period of time.
The following information has been documented by the administrator:
Internal and external users are able to connect to their desktops.
External sessions connect via a Unified Access Gateway.
Users are immediately able to reconnect but will be disconnected again in a few minutes.
Internal sessions, connected directly to the desktops, are not impacted.
While the session remains connected, all expected functionality works properly.
What could be a cause of this issue?

A user reports that sometimes they have issues using their remote desktops and published applications.
What three pieces of information should be collected to troubleshoot the issue? (Choose three.)

Which pre-requisite should be met before installing the Connection Server?

Which two types of pools can be created in Horizon on Azure VMware Solutions(AVS)? (Choose two.)