You have been given four: two species of Obdurodon, one Steropodon, and one Monotrematum sudamericanum. We can't particularly see the evolution of the soft-tissue features, or even much back of the skull, but such is often the case with the fossil record.
It isn't a disproof of evolution or a proof of anything else that you only have so much data about the past.
That's not my fault. Evolutionists claim that the fossil record proves evolution. They cannot prove the descent of the platypus, then their claim is false - as I have said many times here. The platypus proves quite well that the soft-tissue features which the fossil record does not show are very important. Therefore paleontology and the fossil record are total bunk - also as I have been saying for a long time.
Furthermore - and this is what you constantly avoid addressing - there are numerous other species around, none of them even have half the features of the platypus I asked about. An animal can only descend from one species not from multiple species, even without the fossils, there should be something close to it from which it could have descended there is no such thing. So again, the platypus is a disproof of evolution.