In my view, the goal is to
It depends on the company and if you have a formal research function or not! I've done everything from recruit participants, write discussion guides, field surveys, moderate research, synthesize insights. Or, I've given a researcher objectives and key questions and then sat in on a few interviews here and there. I think every PMM should have the experience of running their own research at some point - it keeps you close to the customer, helps you empathize with them and develop relationships with strategic customers (like if you run a CAB).
But, as an org grows, you won't always have the bandwdith to do so. So, you have to find more scalable ways of staying close to the customer via Gong calls or collaborating closely with Research teams to make it easy for you to listen in on research or calls if you want. It can be hard to prioritize in the day to day but will make you a stronger product marketer and able to add more value to your product, marketing and sales counterparts.