How to add OTA to your great project “Making Your ESP32 Web Server Password Protected”?
Unfortunately I don’t have any tutorials on that exact subject, but I would recommend starting with this example. Go to Files > Examples > ArduinoOTA > BasicOTA
That example is the easiest way to include in most web servers.
I apologize for taking so long to get back to you, but I’ve been with an eye problem and I had to limit my access to screens (computer/smartphones).