How to expansion picture from textbase64 which sent to MS Team

How to expansion picture from textbase64 which sent to MS Team.
I try to use coding as show below and already sent picture to MS team via webhook but , can’t click on picture to exapand picture to see detail and zoom picture. How can I do for this.
As I find in document it recommend to use allowexpand = TRUE but it still not work so I’m not sure that I am wrong to use it or this function still not work.

{‘type’:‘Image’,‘url’:'data:image/png;base64,“& strImageByte64 &”,‘msteams’: {‘allowExpand’: true,}