I finally got a ripe seed pod from Dwarf Pink Singapore. The seedpod did not open all the way yet, it was a good thing I caught it before it split open. (I kept postponing to put netting or stocking on it.)
The seeds are tiny compared to the other plumeria seeds I germinated before. I counted 21 seeds that look like they may be viable so I planted them this afternoon in tiny black pots (for succulents).