I came across
https://toggle.org/download-vpn-apple-tv while looking for VPN solutions tailored for Apple TV 4K streaming, and it seems pretty well-suited for what you’re describing. This VPN app offers ultra-fast streaming speeds, which is crucial for smoothing out 4K playback and reducing buffering. It’s a native Apple TV app, so no router setup is needed, which makes installation straightforward for most users. The servers are optimized globally, delivering consistent high-quality streaming even during busy times, which greatly reduces lag issues. It also features encrypted connections that prevent ISP throttling, helping maintain steady speeds without the usual slowdowns you might expect. The app supports multiple device types, including various Apple TV 4K generations, and provides privacy on every connection with just one tap.