The "/reqpwreset" page:

A form is presented where the user can enter their email address and a captcha. If the email address entered corresponds to a known users, an email is sent to that address that contains a link to the /resetpw page that allows the users to enter a new password.

This page is only available if the self-pw-reset property is enabled and email notifications are configured and operating. Password resets are not available to users with Admin or Setup privilege.