firstly i cant see the jam in cubase 12. is there a script for it? or can i make a script in controller editor?
You can make a script of course, but not in Controller Editor.
You will do it in Cubase Midi Remote
This article will help you make your script. It has few ready templates but not for the Jam, you may use them as a "base" though.
Check also Steinberg midi remote forum:
Greetings Rasta.
You will also need Controller Editor for this, but as soon as you’ll start watching the good suggested video or read the article, you’ll understand it immediately
Indeed, that is correct.
You don't need the Controller editor to create the Cubase midi remote itself, but you need it to create a template to load it when Maschine is used in Midi mode in Cubase.