Key pad disappear

Hi dear …

I updated my iPhone X to iOS 16 when released, it’s worked properly and there are no problems faced. Yesterday, and suddenly, I unlocked the iPhone, I found the key pad disappeared from texting apps, the problem lie behind, that I restarted the device (to solve the problem ) and as you know, the password is required to unlock the iPhone after reboot. Thank you in advance for helping me with my problem.