> The part where I want wired ethernet to that SBC,

In that case the path of least resistance becomes something like a $22 NanoPi NEO (has onboard ethernet, widely used in PiKVM setups)

Oh, you were talking about SBC, not embedded. I even echoed it, should've noticed. Whoops.

Maybe I'll look into that, wouldn't require messing around with the picoprobe. Thanks!