Ok, listen, Amal is correct. Earlier in this thread, maybe more than once, it has been clearly stated, the geographical location IS NOT IMPORTANT! The only thing that is or that is required is that the Keyboard be set to English (United States) US Keyboard.
Understand, I am in Canada, everything is set to Canada except, the keyboard! And the emoji panel WORKS!
And, btw, this will change w/ the Spring Update (1803)... for quite a while this is not the case w/ Insider Builds; example, I am in Canada. Regular installation, have to have K/B set to US, but, my Insider Build is all Canada & emoji panel is just fine.
It will no longer be restricted to US Keyboard only when we move to Win10 Version 1803 in April.
Cheers,
Drew