This is something that would really help especially for large webites that have many sub pages, however doesn’t currently exist in Bubble.
The current best solution that I know of, is just in the name, so you could do:
/admin
/admin_manage
/admin_directory
/admin_login
/user
/user_profile
/user_photos
/user_friends
Another solution is to use groups on the page to give the allusion of different pages, but I am not aware if that would help in your case.