It can seem non-obvious and differs with each company but here are some patterns I've seen work. All the below assumes you have no PMing on your resume.
The below assumes you're going to try and find a role in your current co.
Some examples:
Get into the habit of writing these
You want your name in the conversation.
a. You're looking at it. Twitter is super powerful to get known in the PM world as a smart product person. Build a brand for yourself with your writing.