It can be whatever you want it to be.
The most reliable way to do a softAP for DS is with one of the OG Nintendo Wifi USB Connectors. Either with the official driver which just lets it be used with official software or a modded one that was intended to let it work as a general purpose softAP (for use in homebrew as well as official games)
Both of those drivers are hella old though and you'd probably need a XP VM to make them work.
You could also try Connectify Hotspot which works on Windows but I had no luck getting it to work in 3DS software, never tried it with DS software though.