I dunno about BT, but fwiw I just use a really cheap USB keyboard. you can use USB hubs with the MPC if you are low on ports.

www.amazon.com/Gaming-Keyboard-Rainbow-Designed-Nintendo/dp/B08KYFR6MB

it was a game-changer tho. naming things on that screen is a bitch-and-a-half

the next one i'm trying out is https://www.amazon.com/Mechanical-Keyboard-Gaming-Keycaps-Computer/dp/B085ZDXGZW/

for a more retro look, because the rainbowlights get old. more compact, too.