So this comes back to a more advanced topic that I don’t have much experience in, so take my minor knowledge here with a grain of salt. Unreal itself doesn’t have native functions to utilize some of the features you’d have to use, so you’d need a bit of a knowledge of mobile development and the android API itself to be able to pull off wifi LAN specifically.
Since I don’t believe Unreal has native functions to utilize that portion of the android API, you’d have to manually write it, which is way above of any support I can offer.