I doubt its gonna be multi-platform cause just by the history of the wiiU/Nintendo, no Nintendo funded games went multi-platform ever, as I recall
So sorry guys, if you really want to play this game, get a wiiU or else quit nagging about it
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850