Accessing PC Files from TV?

I have a Samsung QA50Q80BASXNZ on which I recently started using PC on TV to work remotely on my PC. It works so well that the family insisted I get it going on the other Samsung Smart TVs that we have.
Unfortunately that was a no go since those TVs are pre 2019 and don’t have that feature.
So I’ve start looking at SmartThings as a possible solution but I cannot find a way to add a PC to the hub. The PCs can see the TVs but the TVs don’t see the PCs.
Is this also a brick wall, or have I missed something?
I’d be eternally gratefully for any help or info.