That depends on the age of the garage door opener.
if you’re opener is newer, it will need a repeater plugged in for it to work
There are several references to it here on the forum. Best to do the research to see if your opener will accept this and if indeed it’s your problem.
I discovered this after many failed attempts to sync the homelink with my Chamberlain opener
LiftMaster 855lm Homelink Repeater Kit
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