No automatic peak detection, I agree with Thaddy.

There is a manual interactive peak detection with some limitations, though. Look at example "distancedemo" in folder "demo/distance" of your Lazarus installation, page "Fit": Select "Find peak" in the "Measure" box, then, holding the RIGHT mouse button down, drag from the somewhere below the peak to somewhere after the peak. The routine will fit a parabola to the data in the range spanned by the mouse range and display y and y value of the parabola's extremum.

Note, however, that this does not separate overlapping peaks or subtract a varying background. Therefore, the peak producing the shoulder near x=6 is reported at an incorrect value (7.75, but from the construction of the curve it should be at 2*pi = 6.28; finding the correct value requires more effort).