Hello,
at the moment my project (nearly finished) is a Wake On LAN repeater.
Problem: Most routers do not allow to send a broadcast message in the internal network from outside.
Solution: The router forwards an UDP port to ESP32. The ESP32 validates the UDP packet and sends the broadcast message. Also included is a NO-IP client for updating a DNS entry. Configuration is done on a terminal (screen or PUTTY) via serial. A Web interface will come soon.