I don't think Apple is the only mobile vendor. I think that between AMD, Intel, Qualcomm, Mediatek, Samsung and Google, they will realize that they are all being screwed over by Nvidia. Right now ML is still mostly research but when real products start surfacing (or, perhaps, for real products to surface to begin with) they will have to settle on something, wether it's ROCM, OneAPI or something else.
You mean aside from their long history of developing open things, from Webkit (based on the KDE's open basic wkhtml and made into a full-blown browser engine) to Swift?