Hmmm...your question is "why"...there truly is only one answer...because the developers of the device did not decide to support whatever it is you are attempting to use, and hence that is incompatible. Now, if your question is why did they decide that, there is no way to guess...this site is not "insiders", and hence has no access to nor ability to release "insider information" (which would be necessary to truly answer the question).
Occam's Razor nearly always applies when troubleshooting technology issues!
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