I cant be 100 percent certain on this ('cos I never did it on my T5-76) .. others may tell you with certainty!
But I think you boot up, as you have done, and then connect Tyros to Host USB on PC/Laptop to access.
Not a Network visible device over wifi .. This would mean having a media server/USB sharing setup, and I dont think that capable.
In theory, the Tyros/Genos 'could connect directly to YamahaMusicsoft account and load packs directly .. and YamahaEurope to check/update Firmware directly. Yamaha would have to build in extra wifi/net features/support, and did not do so, so we have to live with what they give us.
Al.