I think Mullvad doesn't use the NetworkExtension API but relies on tun/tap. WireGuard used to do this in the past. But if you want to run a VPN on iOS devices y

I think Mullvad doesn't use the NetworkExtension API but relies on tun/tap. WireGuard used to do this in the past. But if you want to run a VPN on iOS devices you need to implement via NE anyways, so I believe the development was streamlined and the macOS version was build using NE as well. Afaik you can still install WireGuard via Homebrew: https://www.wireguard.com/install/#macos-homebrew-and-macports-basic-cli-homebrew-userspace-go-homebrew-tools-macports-userspace-go-macports-tools https://www.wireguard.com/install/#macos-homebrew-and-macpor...