Question for guys who have successfully bulked up after RNY

Had a sleeve. But I went on a super-strengthening program about 2 years out from surgery. Doing function fitness -- Crossfit type exercises -- 4-5x a week -- mixed in with sprints and other running drills (as the end-game was to improve running).

I gained a lot of muscle for a woman and without even trying. I gained about 5 pounds and most of it seemed to be muscle.

We did a lot of work with deadllifts, overhead presses and kettlebells but also some more  standard Crossfit exercises thrown in.