Change password fields

“Generate password” button, which you say “it is not the usual field”, is the standard since WordPress 4.3. You can click it and a new password is auto generated; if you don’t like it, you can modify it before saving changes and update the user data.

So, your question is basically wrong assuming that fields are not “usual”; they actually are. To change the password:

  1. Click on “Generate password”.
  2. A auto-generated password will appear in a text input field.
  3. If you like it, click on “Save”https://wordpress.stackexchange.com/”Update profile”.
  4. If you don’t like it, edit the password in the text input field, then click on “Save”https://wordpress.stackexchange.com/”Update profile”.
  5. If you modify the password and it is detected as “weak” by the system, you must check a checkbox to confirm the use of a weak password.