Personal anecdote, at Amazon, my wife led a very challenging refactor of legacy code and didn’t get promoted, I built a shiny thing barely anyone is using yet, and got promoted.
How much of that is the effect of shiny vs. dull, and how much is male vs. female (apologies if my assuming you are male was mistaken, but it seemed the way to bet)?
It wasn't just process, either. I saw severely unfair decisions go the other way. A woman in my team who everyone hated because she was dishonest, staggeringly unproductive and had a habit of upsetting other teams, sailed through promotion several times into management. On the other hand team members who created entirely new products from scratch or were the backbone of their team got bounced. The patronage of another (female) boss higher up in the management chain seemed the most likely culprit, along with a pervasive "everyone's gotta help women get ahead" attitude.
I’m going to further reduce this to lazy management. It’s easier to point to splashy announcements to show impact than it is to put in the work and help your direct reports quantity unglamorous maintenance work.