There are so many billions of dollar being spent on this hardware that everyone other than Nvidia is doing everything they can to make competition happen.
Eg: https://www.intel.com/content/www/us/en/developer/videos/opt...
https://www.intel.com/content/www/us/en/developer/tools/onea...
https://developer.apple.com/metal/tensorflow-plugin/
Large scale opensource is, outside of a few exceptions, built by engineers paid to build it.