My previous employer (which I also joined as a startup) ended up in a situation where the head product manager became VP of engineering (it's a complicated story - don't ask). We also had a yes-man director of Eng and together they went all-in on very orthodox scrum, where they sat in the sprint planning/point meeting and overrode every decision of what to take off the backlog and enforcing "themes" of each sprint to ensure that only product work got done. It was very rare that any tech-debt work got dealt with, and security work was only done if it burned down CVEs or other "quantifiable" metrics that were contractually obligated.

I ended up ok as there was eventually an exit, but the core experienced engineering team all left within 6 months.

Now I'm not only allowed, but encouraged to take initiative and while of course I do product work, I can also take a step back before taking two steps forward again.