You're right. I've never come across such usage of "falsified".

jibal · on Sept 11, 2023

It's quite common is discussions of falsifiability, e.g., https://www.scientificamerican.com/article/the-idea-that-a-s... , https://explorable.com/falsifiability , https://blogs.iu.edu/sciu/2021/07/31/what-does-it-mean-for-s... , https://www.sciencedirect.com/topics/computer-science/falsif... , http://variable-variability.blogspot.com/2014/03/falsifiable... , etc.