7D Rubik's Hypercube solving #1 (1L 2C Cross)
7D Hypercube is Hepteract polytope https://en.wikipedia.org/wiki/7-cube
Step#1: First Layer: 2C elements cross
Software: Magic Cube 7D https://superliminal.com/andrey/mc7d/
All about 4D..7D hyper cube there: https://superliminal.com/cube/cube.htm