cross-play exists only between platforms in the same box (variation)
cross-play info is taken only from OFFICIAL resources, follow the link and check by yourself:playhypercharge.com
Hypercharge: Unboxed support cross-play feature, that means you can play together with people on different gaming platforms.
On Crosswatch cross-play are grouped by variations, and you can play together ONLY between platforms in the same variation:
Yes! Hypercharge: Unboxed supports cross-play, but only with specific variations:
Please look at Hypercharge: Unboxed Crossplay Explaining to get more details about other platforms.