Bigger jump button in Minecraft PE

There have been numerous times where I have been playing competitive parkour in CubeCraft, and on the last jump, because I am so focused on the screen, that my thumb misses the jump button. This really aggravates me, and my friends have been complaining about this too. It would be really helpful if this could be altered.

P.S. I put this topic in gameplay because it has been a regular occurrence in Survival, but please don’t judge if my choice is incorrect.