Yeah, I thought that it would not work because of the instant action of on tap.
I have a project where I used to use On Tap and Double Tap but I changed to "sliding", so now, instead of Tap, the player needs to slide the screen so if he slides just a bit it will have a small jump strenght, if he slides more, it will have more jump strenght.
Sending the img of my project so you can try if you like it.