Clone 972lm remote

I just purchased this “2 Pack - Replacement for LiftMaster 970LM 971LM 972LM 973LM - Chamberlain 953CB - Craftsman 139.53681 Remote - Compatible with Garage Door Openers with Red Orange Learn Button 390MHz (C-SP-390)”, from Amazon. I was able to easily program my Garage door opener. My question is this.

I have a 972lm remote with one of the buttons programmed for our community gate, which I would like to clone. How can I do that?

Our remote will need to be programmed directly to opener itself (by using opener’s learn button).

It can’t clone other remote’s signal.