There's the "Hamachi" program for the PC, with which you can play local PC games over the Internet. Would it be possible to somehow use that on a Nintendo Switch? (No hacks)
No, because for that you would first have to mod the switch so that something works and then you would first have to find such a program for the switch, and since there's none for the 3DS, I don't think it will be any different with the switch.
Hm. I thought maybe that you could connect to Hamachi on both PCs and then do something with a mobile hotspot
Nice idea, but unfortunately not.
I think you can