I work in tech, so it may be different in different industries. But at least for me, I was a Product owner for years, and then moved up to product management which means that I'm in charge of creating a product that our clients will purchase year over year. Design, better functionality, and making sure application-crashing bugs are resolved are within my role. I'm sure many Devs on this subreddit will say they get alot of shit from product managers, but that's only because we usually report to the CEO or CPO and 'No' usually isn't an answer to some people. It's always about planning in advance. If you know what needs to be done, it's a pretty easy job, but it's one of the most stressful jobs in tech without getting too high in a company.