Since agaves are not bulbs they won't produce bulbils :-) What you are seeing/gathering are just the seed pods. I can't see distinctly enough in the photo but they don't seem to be fully ripe although I am not absolutely sure as I have never grown an agave from seed!! But you can check online as there are numerous sites that describe the ripe pods with photos and will guide you through seed propagation as well.

Thank you! I googled for the longest times and all of the sites showed bulbils and "pups" Now that I am googling "agave seed pods" I see the things sitting in a bowl on my kitchen table!