I have a learn button on my opener and homelink absolutely lets you program with only using the remote.if there is a learn button on the door opener, there is no way to program the truck w/ out hitting that button. Most openers these days have a “rolling code” technology. First you teach the truck what frequency to use to comm w/ the opener…but then you have to tell the opener to learn the current code that your truck is sending out.
What model garage door opener do you have?