If all you want is to make a bot that can use passkeys automatically, add a transistor between your Yubikey's touch button and GND. When you turn the transistor

If all you want is to make a bot that can use passkeys automatically, add a transistor between your Yubikey's touch button and GND. When you turn the transistor on, the capacitive sensor is activated. Now the Yubikey is just an API you can call, websites cannot tell the difference. You can't export keys, but a bot can add new keys after using existing keys to log in.