Python threading improvements

Dear David,
Are there examples like this but for C++ codes? We have a GUI application built on top of VTK and there are rather long VTK updates that lock up the UI thread. Are there examples somewhere that show how to safely push off some of the VTK updates onto another thread so that the GUI thread is not locked up? This is using VTK 9.3.1 and Qt6 > 6.5

Thank You.