Well, another 30 seconds of google got me this:
https://www.amazon.ca/UGREEN-Etherne.../dp/B00LLUEJFU
Combine with this:
https://www.amazon.ca/ZYF-Adapter-Ch.../dp/B08TH8ZVS6
You can probably find the cable in the second link cheaper, I didn't search for long, but the top one apparently works with a Firestick.
As previous, realize that with USB2.0 you will probably get 300mbps overall, if you're lucky.
A forum for you to read:
https://forum.kodi.tv/showthread.php?tid=336151
ers