Hi Erin Pitcher,
Thank you for reaching out to Microsoft Q&A forum. I know losing Wi‑Fi on a new device is really frustrating, especially after already trying a factory reset.
Since the Wi‑Fi adapter no longer appears in Device Manager and the device only connects when using a dock or Ethernet, this points to an issue with the internal Wi‑Fi hardware rather than Windows or drivers.
At this stage, the best recommended step is to submit a repair request online through your Microsoft account so the device can be inspected and serviced under warranty, if applicable.
If you prefer in‑person support, you can also bring the device to a Microsoft‑authorized service location. Their technicians can run diagnostics and complete any necessary warranty repairs using genuine Microsoft parts.
Before sending it in or bringing it to a service center, please make sure any important files are backed up.
If you need to stay connected in the meantime, it’s perfectly fine to continue using a Surface Dock, USB‑C to Ethernet adapter, or a USB Wi‑Fi adapter as a temporary workaround.
I hope this helps, and that your device will be back up and running smoothly once it’s been checked by the service team.
Thank you for your patience and understanding.
Best regards.