Comment by TeMPOraL

Android 17? If yes, then that's because they added a new permission specifically to block apps from LAN access, then bundled it together with "nearby devices" (one introduced earlier specifically to block Bluetooth and WiFi scanning and point-to-point connections) because apparently they believe the concept of "local network" is too difficult for normies to understand or something - and due to how it's implemented, even apps trying to talk via loopback with themselves get captured in scope, too. The UI won't tell you which is which, though.