Wireguard install tutorial refers to nonexistent package

The " WireGuard road-warrior automated" installation tutorial at https://openwrt.org/docs/guide-user/services/vpn/wireguard/road-warrior refers to installing the luci-app-wireguard package.

But this package doesn't exist in version 23.05.2 of Openwrt.

So what is the correct way of getting to a Wireguard server installation which works as described in the tutorial and which, importantly, can be managed through LuCI ?

The app has been merged to the protocol app
You need luci-proto-wireguard