Sup everyone, could i get some rating on my bagwork from 2024 this was last round so Im lowkey tired but kept goin any recommendations for improving

Sup everyone, got a question bout submissions. I do sambo and when I spar and I end up on top and the opponent is in guard and he blocks me with his legs, specificely wraps them around my waist, what are effective submissions to do in this position, except ankle or heel hook

I'm wearing a black uniform and helmet. He is one of the strongest young men in our gym, he has been practicing MMA for many years. In this sparring, I was only defending myself, because he works as a counterpuncher and he responds to every attack I make with a series. I want to interrupt him with my hands, when I use my legs it's much easier for me because I can control the distance better and interrupt his lunges with front kicks. In the end, I tried to counterattack too, but he easily defended himself from everything. the wrestling option disappears immediately, because his grappling and takedown protection are much better.