I tried added a key file and even a password txt but both lead to it still asking for me to type in the password.
Is it because the drive is encrypted? I tried placing the files at /, /boot, /root, /etc
Edit1: I’ve tried to install dropbear and give it ssh keys. I will try to reboot in the morning and see what happens
Edit2: signing in via ssh just says port 22 rejected not working :(
Only if they gain possession when the device is running with the drive decrypted and they keep it running the whole time. That is a lot higher bar then being able to turn the machine on at any time and then recover the key. For example if this is a laptop that you are flying with. Without auto-decryption you can simply turn it off and be very secure. With auto-decryption they can turn it on then extract the key from memory (not easy, but definitely possible and with auto-decryption they have as long as they need, including sending the device to whatever forensics lab is best equipped to extract the key).