AFAIK the C implementation is a kernel module that's not shipped in stock Android releases. The WireGuard Android app uses that module when available, but otherwise uses wireguard-go.
Good knowledge here, was unaware of this feature of the app. Would there be any case of the app defaulting to the wireguard kernel module if it's not included by any OEM Android release? I would assume that means most users are actually running wireguard-go.
