Google has switched in 2020 (if i am not mistaken to canvas), but I am not saying this would be the solution to everything, It is just another option one could do. I do not know if someone noticed this, but that is part of the reason you could not just open google docs on mobile. Because I would suspected that it would been too much effort for them back than. In anyway Tasfer tried as best as possible to do that on mobile too.