i did think of this, but i was unsure of its compatibility with 9front. the FQA only
lists two usb to ethernet adapters which did not look popular or generic when i looked them up. i will buy the most popular one and hope it works. 

On Wed, Nov 9, 2022 at 7:55 PM <adventuresin9@gmail.com> wrote:
You can use a usb to ethernet adapter to add more ethernet to a pi.  The ethernet on a raspberry 3 is actually just a usb to ethernet soldered right onto the board.