When I got into mma I was just a body builder who did a lot of cardio,played basketball, soccer, etc... And ran 4 days a week. Can confirm that a strength advantage was huge and I had a smidge of wrestling under my belt. I had one year when I was in seventh grade. Flawless season, I didn't win once. It was enough to know how to do a double leg (I was actually quite good at this) and nothing else to speak of. I was able to roll with blue belts no issue right out of the gate. They could beat me, as I had no submission skills except for an americana, but I could control them. Did a novice fight at naga and rolled through those guys in about a minute each, I think I had 6 or 7 matches. Moved up to beginner next and won that too pretty handily once I had a meager submission game (knew the moves but didn't execute well, basically just drove my score up to double digit leads from switching from one unsuccessful sub to another).
Another guy I trained later came over with no wrestling just strong as an ox. He rapper his whole division in about 5 minutes total. They couldn't stop his strength at all and he knew 3 subs well, so he just forced them into those.
As a blue belt I competed in the advanced bracket and had no issue beating those guys, same reason. I left mma to go to powerlifting because my joints aged out of mma really. Couldn't recover any more. Got strong and fat. Got invited, remained fat. Got strong again, got covid, lost 50 pounds off every lift, stayed fat, decided to lose weight and figure out wtf to do now.