Useless

http://example.com/wp-admin/admin.php?page=lockdown-wp-admin
Goes right to login page

http://example.com/wp-admin/
Goes right to login page

http://example.com/wp-admin/admin.php?
Goes right to login page.

So if you don’t know the page it’s simple to find.

https://ww.wp.xz.cn/plugins/lockdown-wp-admin/