I have not tried an usb-wifi-adaptor but I just recently tried an usb-lan-adaptor with my S7 and it just worked fine, so I would just give it a try, maybe it simply works without the need for an extra app(?)
edit: wifi would of course require some sort of UI for credentials etc., not sure if the system provides it… the lan-connection did not require any UI…
After my breakdown, I thought it would be great if you could connect a compact USB adapter and when you need to use wi-fi and when you don’t need your phone is out of reach, of course this is not very convenient))
I thought this would be the opposite direction (?) (like pc can access internet via usb connection with phone that allows utilizing its mobile data connection)