I had a similar story. I was hired as the first engineer after a mobile agency had built native (iOS/Android) mobile apps.
I built a React web app to support scaling, rewrote the mobile app in React Native to ship faster, and built a ton of features.
We went from 0 revenue to 100k+ ARR, and I got 5% of the company on paper. Then, I hired a small team, and the company scaled to 10M ARR.
I left the company because I had a disagreement with the founder. Today, it is probably doing 20M in ARR, and my 5% (which I still have on paper) has never turned a dollar for me.
Right now, it's totally dependent on how the founder takes the call. I am trying my bit, but as I'm way away from marketing right now, I have no clue.
If you didn’t, you can write like a human here.
No need to make every line a slogan.
Still I am grateful for this opportunity to spread my knowledge.
Onwards and upwards to the next comment section.
Peace.