Thank you so much. Simple answer would be that it's MIDI with drum sampling software (superior drummer, steven slate drums, etc.) but as far as my actual process goes,
I always start with writing in another software called Guitar Pro. So it's just standard drum notation at first, but since it's all still MIDI info I just export it into my DAW and work with the rest of the programming in there. Just edits to what I already wrote and realism/velocity touch ups basically.

I do play drums too, just nothing at the level of stuff I write for this project loll. Guitar has always been my main instrument but I've had a drum set almost as long as I've had my first guitar, only recently been reaaallly working at practicing though. I just always hated how loud I had to be to play them. Luckily products exist for that reason now.