The Swiss variant deconvolutions (https://cov-spectrum.org/stories/wastewater-in-switzerland) now discriminate between JN.1* and KP.2*. Data until May 18th.
The Zurich result is quite nice:
Absolute JN.1* (w/o KP.2*) loads did practically not grow. All growth is due to the fraction being discriminated as KP.2*