Judging by the wiki (https://wiki.openstreetmap.org/wiki/Key:bicycle_parking) it seems like a bicycle_parking=rack. I checked the StreetComplete quest source code for bicycle parking and it doesn't have that as a choice (possibly bc a lot of things can be racks. it's not very specific). 

Anyways, here's the closed GitHub issue for adding racks as a choice https://github.com/streetcomplete/StreetComplete/issues/2250 if you're interested in the discourse around this and why it's not an option.

For any bike parking that doesn't fit one of the choices just make a note and attach a photo like you did here!

I've added the type of parking in https://www.openstreetmap.org/changeset/154475642
