If it is not available on GooglePlay for your region or country then it not available. I believe they are waiting for their agreement with Sky to run out before launching in to these regions. Expected in 2025.
Yea, if it's not on the store you won't be to download it on the TV, but just to be sure check the current software version on your TV to make sure that you're on the latest one, if you're on the latest one then yea you won't be able to get it.
