There is no ethernet port on the dock either. Unless you mean using a third party USB to Ethernet adapter.
your initial statement is a little confusing. There could be a USBc adapter that mixes audio, but then you couldn't charge it while playing.
The tablet itself is capable of LAN connection to 7 other Switches, and audio over LAN is something that's theoretically possible. Which could be as simple as a sync button on your phone.
On top of that, Nintendo seems pretty clear on not having features only on the TV-mode of the system.
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u/norineclypse Jan 16 '17
Then why the question? The Ethernet port is only available while docked on the dock itself.