I've had about the same level over the years. Early on, before I had a nest egg, I had little real autonomy, despite outward protestations top-down asking for risks and ideas. Afterward, maximizing average outcomes rather than worst-case risk, I've had a ton of career success either proposing and executing good ideas or else just ignoring the product roadmap when necessary to make the company better. I encourage my team to do the same (ideally they have to resort to subterfuge less than I did since I highly value bottom-up input, but either way is fine). It's, again, risky, but if you consistently deliver above expectations then in many environments you'll get more promotions and raises than you know what to do with, despite the lack of predictability.

Lately, product and my boss have been on board, so it's been fantastic to actually have partners to discuss these "risky" ideas with and better fit them into the roadmap rather than guarantee things which would get us all promoted will be shot down instead. I personally have more bottom-up autonomy than I think I've ever had at $WORK.

That's only anecdata. Another aspect of that tech microcosm is that at various points I explicitly did not have permission to do the right thing and had to be careful with the politics. It only worked out because I was right and because I was okay with the consequences if I had been wrong. Maybe that means I had low autonomy in your definition?