Can you take a look at the autopkgtests regressions? [1]. camitk
probably needs
to be removed from testing, but I don't know about the rest.
I did take a look at camitk, yesterday; Yes, IMHO, it needs to be
removed. (FTBFS is unrelated to vtk; it is a QT Problem)
Regarding the other regressions, it seems to me that the rebuilds are
incomplete, possible the Ben file is not seeing some affected packages.
Looking for example at mayavi, despite it B-Ding on python3-vtk9, but it
has not been binNMUed.