My programmers implement a lot of systems in the game, which is using waypoints. Waypoints are used as paths for NPCs, points of escape, paths for the camera and many others. In the code, you can still find out what is happening, but the editor is a lot of waypoints and nobody knows what the waypoint is ...

Here my great request. Is it possible to create for a waypoint the same or a similar system as for objects? To be able to give waypointom their types and be able to display only certain types of waypoints?

you can use naming system for the waypoints
"NPC-xxx"
"CAMERA-XXX"
"ESCAPE-XXX"

Of course, the code is a very good solution. However, in the editor is too much waypoints and they are impossible to distinguish...
A good idea would be to hide the waypoints, for example, on the basis of their types.