Hey @hortondima,
It is nice to see you again 
We do not yet have a public demo of customUI in swift but there is a thread here that you might find useful: I want to add a custom button in the meeting option toolbar in my zoom app in ios. I see there are provisions to hide or show the toolbar or even specific buttons. But is there any way to add a custom button in the toolbar under more in IOS? - #9 by Michael_Condon
Thanks!
Michael