Here is a bjj match analysis for a Jiu Jitsu World League tournament I did in 2021.
Some key takeaways:
-I should have kept my elbows high* when attempting to pass with double underhooks to avoid him using his hands to defend the pass
-I should have used a rear body lock to better control him from the back
-I could have also used double underhooks from the back to better maintain back control and avoid letting him escape