The Automatic Login as per Apple may allow bypassing the Required Typing of Password on a Startup
https://support.apple.com/en-ca/HT201476
From a Security of computer stand point - I would not use this method
It could leave all the data and sensitive personal data a risk
Though, if FileVault is enabled on this computer, Automatic Login will not work
Excerpt of portion from above link
Log in after sleep or screen saver begins
You might still need to enter your password when your Mac wakes from sleep or stops using the screen saver. You can change this behavior using the “Require password” screen saver setting located in Lock Screen settings (macOS Ventura or later) or Security & Privacy preferences (earlier macOS versions).
EDITED