Thank you all! I didn't think I got so many answers, so quickly! We don't know what this object is, but there are interesting hypotheses.
I personally believe that the right path is the one indicated by Richard G., who speaks of Indian agricultural tools; as seen in the links below, the shapes are very similar, although the decoration is completely missing.
https://picclick.com/Unique-Farming-...063114755.html
Otherwise we can always solve the question as archaeologists and ethnologists often do, defining this object as a "cult object", which is fine for everything ....
thank you all!