Add a category in TAC, Support Case Manager

Add a category in TAC, Support Case Manager > Webex > ... for Webex App

It is not evident which Webex product Category to select when opening a TAC case under the Webex (specific) Support tab for Webex App client.

TAC has responded that the team that supports Webex App is under the current category
Messaging > Messaging (conversations, presence, spaces, and teams)

This is not very clear as Webex App client (outside of Webex Calling and Calling in Webex App (Unified CM) crosses many functional divisions such as Messaging, Meetings, Calling, Collaboration devices, etc.