Let's crowdsource the secret features in Webex Meetings that you need to request to be enabled by your CSM. Add the ones you know in the comments and I will update the doc.
Allows you to set default sessions for new users or change global settings like ability to record meetings.
Access Anywhere - https://help.webex.com/en-us/WBX51223/What-Is-Access-Anywhere
Active Speaker Video Position in Downloaded MP4 Recordings- https://help.webex.com/en-us/WBX000028406/Speaker-Video-isn-t-Contained-in-a-Downloaded-Recording
High-Definition video (720p) in the Cisco Webex Meetings Site Administration - https://help.webex.com/en-us/WBX51163/How-Do-I-Set-Video-Quality-in-Cisco-Webex-Meetings-Site-Administration
End to End Encryption in Meetings - https://help.webex.com/en-us/n4f016ab/Use-End-to-End-Encryption-with-Cisco-Webex-Meetings
Seems like it should be there by default, but I'm pretty sure my first org and now a newly deployed org both didn't have the "Add Site" button under site administration.