you should use the skylight on any mobile forward render. it’s basicly “fake gi” using a static ambient light term to brighten up the shadows.
i have no clue why the shadow resolution and offset is so much different. i guess ios limits the cascade shadow resolution and has lower bit depth for the shadow map depth buffer. the android shadow looks decent. add the skylight and maybe tweak the shadow map bias and you should be good. be aware of shadow acne tho. there are limits to the cascase angles. you’ll not get it to touch the ground at shallow angles, but pretty close.