Will stay with my "no" for now.
Basically you are treating the LG TV as a switch which it is not designed to do.
What you may be able to do is to set up an Access Point or Range Extender.
More like:
Internet ----> Router ~~~~~wireless~~~> Access Point --------- Ethernet cable ----> Xbox
LG TV could continue to be wireless or wired to a port in the Access Point.
Use the following link to learn about possible options:
https://www.lifewire.com/home-network-diagrams-4064053
For product information start with the following link from within this Forum:
https://www.tomsguide.com/us/best-wifi-extenders,review-2225.html
Do keep in mind that you should use a product made by your router's manufacturer. If you purchase a different brand...