FWIW, the technique I was taught....
It's a one handed clap....while holding the stick. You work your wrists and fingers but mainly your fingers. My teacher taught that the opening of the hand was the technique goal, and that was the main motion. (One handed clap) No elbows and really no arm movements except to move around the kit. I'm assuming matched grip.
There's many paths to the waterfall, this is just one that may or may not work for you.
I've tried this, and numerous things recently. I rotate the techniques I practice daily, to get a feel for activating the fingers and then using them in different grips.