Export only materials from selected objects / Package Saving

I was trying to export specific materials by selecting the corresponging objects, but the only thing that i see is that the materials are highlighted and thats it. For me there is a button missing with f.e. “Show Only Materials Used By Selection / Selected Objects” or “Select Highlighted Materials”.
And it would be super handy beeing able to safe everything in the model to a folder, with every material, bitmap, etc.
Is there a workaround, a skript, something that makes this possible?

Thank you

hi @Brickbyte_GmbH this option has been added in Rhino 8