Would be useful if you provided a bit of information on what you want us to look at.
If you look at you expression HP, the Format result as: is set to double - change that to station.
Then edit your crest only label style, edit the PVI Sta and Elev label component, select the HP part of the label in the right side of the editor window, then update the hp label so that the formatting is now station format.
If you don't update the label component, the formatting in the label style will not change and you will still get the station value without the + in it.
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Andrew Puller
Maitland, NSW, Australia
Windows 11
Intel core i7 11800 @ 2.30 GHz with 32GB Ram
Civil 3d 2023