LG Smart TVs run webOS. Unlike
Android TV or
Fire TV, webOS is a closed shop. LG hasn't released a public VPN SDK. In short, they haven't given us (or anyone else) the tools to build a native app.
However, you can still protect your LG TV by routing its traffic through Windscribe using a VPN-enabled router, sharing a
Secure Hotspot from your computer, plugging in a streaming stick, or using
Smart DNS.