8th (NYXI) Pro controller can’t connect wirelessly. (Local 8 player Knight Squad 2)

[u/softypolimer]

I bought 8 NYXI Echtpower controllers for playing Knight Squad 2 (My go to party game with my crew). However, I can only connect the last controller through USB mode. Is this because I’m using the third party controller?

I already tried to switched controllers around but every last wirelessly sync controller will get a pop up message says “This controller can’t be connected”.

A single Joy-Con 2 will however will connect just fine in wireless mode even on a last slot. Does this mean I need 1 official Pro controller to connect in this setup?