(New input system) How to queue a jump before you touch the ground?

I'm using the new input system, and I want you to be able to "queue" a jump, so you don't have to be frame perfect to repeatedly jump. You can press the jump button as you're falling to the ground, and if you hit the jump button less than .25 seconds before hitting the ground, then when you hit the ground, it automatically jumps.

I've seen a tutorial that covers this, but it uses the old input system and the Update() method, which I've heard isn't optimized. Is using Update() that bad? Any other solutions would be appreciated :)