I didn't notice the absence of the bivouacs, that's a major setback indeed.
There is a solution however, the very good Freizeitkarte of Italy contains all bivouacs and since this map is non-NT (and very up-to-date) I can substract all bivouacs and put them in a gpi file. They will show on top of the map as custom POI.
I will do this when I have some time and share the gpi here.