I doubt those buttons ever existed. I don't remember them beeing there and even in old PKHeX builds from 2017 the stats tab already looked like it does in current builds, no buttons for status conditions.
Besides that the build in your first image can not be older than 6 months, as the boxes on the right side look just like they do in current builds, which wasn't the case before November/December 2021.
So whoever made that image probably used their own build of PKHeX, so you should ask them about it.