Select stamps from different groups

Frequently I come up to this situation with stamps where I have parent groups, child groups, and stamps inside all of them:

parent groups => [stamps + (child groups => stamps)]

And I need to select all stamps of a type from the different levels (both parents and children) to modify them en masse.

For example, light effects I want to dim or change color all together, but some are grouped with street lights, some with houses, etc

It would be awesome to be able to select all stamps from the scene from a specific type, regardless of which group they belong to. If moving them messes up with the internal group logic, at least having them fixed in place, but to be able to edit their common stamp options (opacity, color…)