Webex App - Choose no ringtone for incoming calls per line

[stevenle]

According to this link I can set the Webex app to different ringtones per line including no ringtone. However I don't see a no ringtone option. I have to select a ringtone. This article was from October 2021. Was this feature removed? So far this new Webex meeting / calling combined app is leaving a lot to be desired. I am on Version: 42.10.0.23814

Does anyone have an option to choose 'No Ringtone' per the article?

https://help.webex.com/en-us/article/n7wad79/Webex-App-%7C-Choose-a-ringtone-for-incoming-calls

"We provide a list of ringtones directly in the app. Choose your favorite. Or you can even choose no ringtone if you prefer silence."

[stevenle]

Is there a way to add a custom ringtone to the new Webex app? I only see references to Jabber but nothing on Webex. I gotta say, this Webex app is an exercise in frustration.