The HUAWEI MediaPad T3 10 9.6" Tablet is not on the Google Play approved list that I can see :--
https://support.google.com/googleplay/answer/1727131?hl=en-GB
You can check on the above link.
Having said that with the specs your device has I'd be amazed if it failed to run any of the Sky app's.
Running Android OS 7.0, Qualcomm SoC and MALI-450 MP4 Graphics Card. That setup is already in a lot of deviceas running Sky App's.
Now I could be totally wrong that your Tab is not approved by Sky to use it's App's and if this is the case you would have to talk to Tech support as to their reason.