I'm using an emulator on my Steam Deck to play Mario Kart DS online since my internet router is too modern for my DS.
Usually, it takes a while to even get 1 player in a lobby even with the correct DNS entered.
Not sure if it's just me or there isn't really any people playing this game online.
I eventually had to contact a domestic abuse advocate to help me get out of the apartment I was in a lease with her. And filed a restraining order on her cuz she kept harassing me after i left her.