For symbol to be drawn in section the following things need to be done.
The point in the section must have a point code. When interpolating profiles and sections make sure you tick the box to include intersections with strings. Make sure strings for example a pipe are drawn.
The point is added to the section as part of the section. You also need to set it as a fixed point. In the section view - right click and select "reference coordinates". Change the appropriate point with the code so that the fp column is now showing as 1. Hit OK to save.
You must have a feature code library set up with the name of "section". ie from entry - menu - feature codes and setup a code library of section. The code library must have an entry that corresponds to the code. For example if you have a code of pipe then there must be an entry in feature code library of pipe as well.