This came up in #117747.
Unless an object was of OB_VOLUME type, the setting was not updating the
viewport accordingly since the introduction in 365bf103d1. So if for
example a mesh has a "Mesh to Volume" node, the update did not take
place.
If we use context, we can check the evaluated GeometrySet on any object
type with a geometry nodes modifier though and if it has a volume, we
can also tag for update.
Philipp Oeser