As far as I am aware apple only works on approved devices and thier drm blocks non approved devices or won't play properly. They generally approve devices that offer dolby vision as the apple originals are all Dolby Vision. I know recently they announced an app for nvidia shield tv as it meets their criteria.
Even my old Sony oled A1 does not have apple tv as its not approved, tried side loading but still did not work properly. Video unavailable error.
So far for me the humax reminds me of other cheap android boxes I have played with the added bonus of a freeview plus app and feel bit like it's in a beta stage as not everything works smoothly as it should (new update has introduced micro stutter for me). I hope that changes.