Hello @markconan
Thanks for your message,
Unfortunately, this option is not available by default.
Actually a WPUF login page is built with a shortcode [wpuf-login] and if any non-logged in user visit that page it will ask for login. In this case, it will not be able to detect whether this is an admin or what.
On the other hand, /wp-admin a default URL for WordPress to log in to the admin panel area.
Aside, if I broadly elaborate: generally in a website there is a limited of people who have the Admin access capabilities so if they don’t aware about the URL to log in the admin panel then you can let them know or they can also login to the panel by using WPUF login page. So basically its a plus point for the admin users that they can access the dashboard both from the /wp-admin or WPUF login page. I hope this info will be helpful to you.
Regards,