There is this one feature I use regularly on boards with QMK/Vial, or ZMK, called repeat key.
https://docs.qmk.fm/features/repeat_key
Basically it let's you make a key that repeats the last key you pressed.
I usually use it on my right thumb, and seeing the 60he v2 is going to have split space options I figured this would be a good time to request it.
Documentation for QMK Firmware