How to change playcanvas physics

I’m tired and I have headache with ammo.js asshole physics
please give me a road map to changing physics
I haven’t enough time to wasting to change physics
give me a simple solution

There’s no simple solution. You grab another JS physics library (p2.js, matter.js etc) and just use it as per their documentation.

This is an example of PlayCanvas with p2.js by Will.

And a the start of a test with Oimo for just Cubes.