Hello Harsh. When waking your Windows 11 laptop from sleep, if it doesn’t ask you for a password, but ONLY for a specific user profile (the profile you use) there’s a very strong possibility you have either a user-level setting or registry value overriding the system defaults. Since the laptop works correctly when you create a new user, it confirms the issue is ONLY with your specific user profile and not a global user-level setting or configuration.
To fix this, it is best to check the registry key that controls sign-in behavior after sleep for the affected user. Open Registry Editor (regedit) and go to:
HKEY_CURRENT_USER\Control Panel\Desktop
Check for a value called DelayLockInterval. If you see it and it is set to 0, that would be why Windows is not requiring a password after sleep. If you want to return to the original behavior, either delete this value or set it to ffffffff (which re-enables the lock screen). You will have to restart your computer for the changes to take effect.
Also check that your account still has a password, because Windows won’t ask sign-in if your account is passwordless. You can check for a password under Settings > Accounts > Sign-in options.
Here's the reference: Enable or Disable Require Sign-in on Wakeup in Windows 11
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