Yes, there are many ways in the region where there is no visible path but are still official hiking trails marked by signs.

I'm quite sure there is a path, because it's also in the swisstopo maps:
https://schweizmobil.ch/de/map?season=summer&layers=wanderland&bgLayer=pk&detours=yes&photos=yes&logos=yes&E=2743786&N=1229201&resolution=1.00

and the signs are there in google street view. But maybe it changed recently, so I will check it :)