Sorry, I'm at a loss.
I reviewed some resources from LG
Browse articles about LG product repair information, installation guides, troubleshooting, how-to-use and other useful tips for your LG appliances and devices.
www.lg.com
But I didn't see anything that looks like it would help with your issue.
There is such a vast difference in the array of settings available among all the different smart TVs that it may require a support call to LG to sort it.
Unless we have a member, who has a similar setup who might have some specifics to contribute.
It's probably going to be something simple that's being overlooked.
IF you would take a quick look at media streaming.
Just click the Windows 11 start button and type
media streaming
You should see Media Streaming Options appear at the top of the "Search from Start" results.
Have a look and see if it is turned on or not.