I actually got help from the construct discord with this problem. If you want a simple jumpBuffer.
Create a character with platform and Timer Behavior.
(1) Keyboard -> On (Space) pressed -> Player -> Start Timer "jumpBuffer" for 0.15 (Once)
(2) Player -> Platform On landed -> Player -> Simulate Platform pressing Jump
(2) Player -> Is Timer "jumpBuffer" running
(increase or decrease the timer to your liking)
Also, dop2000 really liked your coyote jump! Will help me out a lot in my first game project! :)