is WebGL working at all on mobiles ?

Hi,

I made a game and deployed it on a website. Works on computers but there's somewhere a problem with mobiles.
Works on my phone (Samsung Galaxy j7) but with a very long load time (maybe 1 or 2 minutes) but it doesn't work in any other phones that I had access too (Samsung S5, Samsung S4, and others).
I tried with WebGl from 2018.2.1.f1 and WebGl from 5.6.4.p2.
I made the build with 184 ram, 256 ramand 128 ram.

Any other things at should look at to make this work all over the place ?
And any tricks on how to solve these atrocious loading times ?

Thanks!

 

WebGL 1.0 or WebGL 2.0?
https://caniuse.com/#search=webgl 2.0
Asm or Wasm?
https://caniuse.com/#search=wasm