@anselm45 – I’ll do what I can here, sir.
I can’t discern from your email, but the first sentence says “make a call using Zoom Phone”. Prior to initiating any conversion to a meeting, did you initiate a Zoom Phone call to the other party?
Next, you have to initiate the conversion to a meeting by pressing the Zoom Phone Meeting button, highlighted here in green:

You will enter a Zoom Meeting, with recording turned on. The other person will either be joined to the meeting with phone audio only, or - if the person is on a Zoom Phone – they should be joined to your meeting via the Zoom client.
I hope this helps!!