I guess we shouldn't be surprised this won't be supported in the Switch version. Switch's online infrastructure is terrible. On the subject of this game, it really should be on Xbox One. A previous console release of it was on the Xbox 360, after all. And the Xbox Series S/X is doing well (under the circumstances) in Japan.
Lifetime Sales Predictions
Switch: 144 million (was 73, then 96, then 113 million, then 125 million)
PS5: 105 million Xbox Series S/X: 60 million
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima