I see. As for starting point, it is not documented https://wiki.openstreetmap.org/wiki/Tag:via_ferrata%3Dstart . Does it work by description value matching the names of the via ferrata relation? I think I changed that to a name, which made more sense to me.

Is it common practice to map all via ferratas in a given spot as one relation when they are more theme-park like instead of mainly serving to securely get from A to B? The wiki says route=via_ferrata is still a proposal and "https://wiki.openstreetmap.org/wiki/Proposal:Via_ferrata#Tagging_as_route=via_ferrata_relation" does not specify this (it says all ways should be added to it, but I think that referes to OSM-way's, not real life ways) . To me in this particular case, there are three via ferratas of different difficulty that can be climbed independently (so red, blue and purple - they also have different names  [by colour], and different difficulty). Hence there should be three relations?

I can change it accordingly, I am just not sure what the best practice is.