Add Phone Number to App from Commandline

I use Enterpirse software that allows me to click on a phone link and it will open the app and add whatever commandline is needed to insert a phone number, example:

From what I've read, via Zoom docs, "callto:" and "tel:" should work, but when entered, even from cmd, the phone number does not get added to the zoom app. It does, however, open the app or brings it to the front window if already open.

Any ideas? TIA

Thoughts: After lots of testing and doc skimming I was able to come up with "tel:[Phone]".  This adds to zoom dialer, but does not start the call. Any ideas ona  command to also start the call?