As of my last knowledge update in September 2021, the conservation status of the platypus was a matter of concern. The International Union for Conservation of Nature (IUCN) classified the platypus as "Near Threatened." This means that while it was not considered critically endangered at that time, there were concerns about its population due to various threats, including habitat loss, pollution, and climate change.
Please note that conservation statuses can change over time, so I recommend checking with more recent sources or conservation organizations for the most up-to-date information on the platypus' conservation status. Efforts are ongoing to monitor and protect this unique and iconic Australian species.