Is Mary Pope Osborne still making Magic Tree House books?

As of my most recent update in September 2021, Mary Pope Osborne was still an active author and was continuing to write Magic Tree House books. Since then, there may have been additional installments published in the series. To get the most up-to-date information, I suggest checking the official Magic Tree House website, social media channels, or reputable news sources for any recent announcements or updates about the series.