I found this in a previous discussion, Why steam doesn't give this link from inside steam, I have no idea Steam Link now available on Windows 10/11 The Steam Link app is now available for Windows 10 and 11.
On your smart TV, download and install the Steam Link app from the app store. Itβs available on most TV platforms including Samsung Tizen, LG WebOS, Android TV, etc. Open the Steam Link app and follow the on-screen instructions to log in to your Steam account. Make sure your PC and smart TV are on the same home network via WiFi or ethernet.
Steam link works really well if your network is up to it. My old G router was awful but I bought an N router and it's nice. Of course wired is best with one of the larger models
HODe.