Hi there,
It seems you are missing the policies after Windows version 2004 which introduced a new Group Policy setting that allows you to configure the minimum password length to a value greater than 14.
To activate the Relax minimum password length limits setting, which was added with Windows 10 2004, you can check with the below article and see if you have updated your PC with the specific KB update. This Group Policy Management Editor allows up to 128 characters.
Minimum Password Length auditing and enforcement on certain versions of Windows
https://support.microsoft.com/en-us/topic/minimum-password-length-auditing-and-enforcement-on-certain-versions-of-windows-5ef7fecf-3325-f56b-cc10-4fd565aacc59
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