Hello! Thank you for reaching out! This feature is not available for all TV's. I would recommend looking through your user manual to find out more information. You can try the following below. But this again may not work. As for a list of what TVs are compatible I will look further into this to try to get the list as soon as I can!
There may be issues with this as from the info provided it seems your TV is connected through LAN, I would recommend just testing it, as I know that it should still work even while on LAN, but try with both the TV and Freestyle connected to the same Wi-Fi band I would recommend using 2.4GHz as our TV's will sometimes have issues connecting ton 5GHz bands.
***Edit***
Unfortunately based on our research we were unable to find a published list of compatible units. But the steps from the link you post should be the correct steps. If those are not working for you then that would be the TV is not compatible. From our research the TV we know that is compatible is the Frame TV. You can look here for more info on the frame TV.
Can you mirror your phone at least to the projector? Projectors are tricky sometimes I had to use a Google Chrome cast to mirror my phone and using Google home and smart things to my projector bc it didn't have wifi good luck
I am able to mirror my iPhone via AirPlay and my Windows PC via screen sharing (via Wifi) with no issues. I can see the projector just fine in both devices using both methods.
So I am out of ideas of why the simplest method Samsung suggest does not work 😞
