Is it progress or not?

So for the past few months I have been attempting push ups fairly regularly. I don't have money for gym so this is about the best I can do. I started with barely being able to do 10, to now being able to complete 100 in a row. In fact, if I allow myself 2 minute breaks after 50 push ups, I can do 500-600. However my concern is that while I can see muscle growth, I don't feel stronger. To give context, I've been bullied for my small figure and weak constitution, which is why while aesthetics were of importance, my primary objective has always been to build strength. Which is why, initially it was great cause I thought bc I can do more push ups, I am stronger but now I feel like I've not gotten stronger at all and instead just gotten endurance.

So has my stamina improved instead of strength or do I need to train more? Pls help. If u can, recommend some more effective exercises that I can spam a lot for strength. I eat well, and I like to spam push ups to the point where my arms can't move, then a day of rest, two if my arms are still sore. Wait now that I'm reading this, am I resting too much? Idk, pls help 😭