Sharrows have a bicycle pictogram which clearly shows it wants to tell something about bicycles. These markings do not. It's simply a stripe that could mean anything. As I said, it's just to make the street look narrower. Besides, they're not yellow, they are some sandy-like colour, but not the typical yellow used for cycling paint in Switzerland.

We also have sharrow-like markings in Switzerland, similar to Bärengasse you also edited yesterday. They have a pictogram on them making it clear to everybody, that this is about cycling.

I don't know if we have a tagging scheme for these stripes. I think something similar was done on the VVRs, where we have the green stripes on it, but can't find it right now.

As these FGSO have no legal meaning, they have practically no rules. Thus, they could be everything. See a few examples from this document: https://www.bvd.be.ch/content/dam/bvd/dokumente/de/tba/strassen/sm-signalisation-markierung/sm-ah-farbliche-gestaltung.strassenoberflaechen-fgso.pdf
Creating some scheme for this could be difficult. Probably something in the direction of surface:colour.

Maybe add a note or description for the time being...