I did it by having my AIController class override UpdateControlRotation to turn slowly towards the next focal point (GetFocalPoint). I then set the character walk/run speed to zero in the character movement settings, and updated the character location manually by something like NewPos = OldPos + (MyMoveSp * DeltaTime * GetActorForwardVector());
As you can imagine, the character didn’t stay exactly on the nav path, but it wasn’t a big deal in my case. There is no navigation function in Unreal that does exactly what you want (a nav path with tangents that take into account rotation speeds). If you want one, you’d have to write it and hopefully share it with the rest of us 
In a case such as you showed, Epic would prefer you add a turn around animation that gets the player pointed in the right direction, and then navigate as normal.