“I installed an extension that lets me import Revit files into SketchUp. Do you know if it also works the other way around? I need to be able to send my colleagues files with the Revit extension – and, ideally, Inventor as well.
you mean Revit importer, part of sketchup studio ?
nope. you might look toward IFC files.
Sketchup 2025 Studio Edition allows you to import .rvt files to Sketchup.
The other way around, you have two options (perhaps more ?)
1 - Help
2 - export an IFC file from Sketchup and import that in Revit.
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If your colleagues send you a Revit file, it’s fair enough that you send a skp file back.. 
(As Patrick suggesting above )
Thank you so much
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