hi! this is a list of all¹ the paths in the splatnet 3 application as of september 10th, 2022.
a lot of these are probably not useful for external applications.
i found all these manually through developer tools. some may be incorrect.
a : indicates that it's a parameter.
i have marked what i considered to be notable with a ⭐️ emoji.
these can be used to launch the splatnet 3 application on a device with the nintendo switch online app installed.
on ios, this is done with com.nintendo.znca://znca/game/4834290508791808?p=<url encoded path>.
i am not sure how this works on android, but it's probably similar.
for example, to open the anarchy schedule, use com.nintendo.znca://znca/game/4834290508791808?p=%2Fschedule%2Fbankara.