In reply to that. I’ve tried it in a locally run sandcastle and I removed all of the viewer settings.
I made the host my ip in order to run it on mobile. The result was as followed.
KML Desktop: Working as intended;
KML mobile:
Huawei Mate 10 Lite: No polygons are being shown;
Huawei P20: No polygons are being shown
This is the code I am running now