The Huawei tablets have not yet been supported because we have not tested on them (in addition, a number of issues have popped up with Huawei phones in our mobile apps) but I just checked with the product team about this, and the good news is that they will be doing testing on Huawei tablets and should know soon whether that device can/will be supported.
Probably the best thing to do would be to join our Android beta community (Adobe Android Apps - Google+) because that would be the first place we'd post a new version of Sketch that would be compatible with your tablet.
I hope that helps. Please let me know if I can (try to) answer any more questions for you.
thanks for your effort and your replys.
I just requested the access to the Beta community and will look forward for coming versions.
I agree to Jens and I would LOVE to work on a Huawei tablet!