C Code program for a WiFi extender/repeater

Hello

I'm Green to Internet knowledge and all stuff around protocol etc.

I want to create a WiFi extender for my daugther. I did test the code from Martin Ger Repeater
GitHub - martin-ger/esp_wifi_repeater: A full functional WiFi Repeater (correctly: a WiFi NAT Rout, but I got intermittent failure. I can't trace where the problem is comming from.

Any one know's where I could get a C Code program for a WiFi repeater? I want a code where the SSID and Password is not pre-defined , but set by the user at a given internet address.

I'm using ESP32

Any help trully appreciated.

Martin