Simplify MULTIPLE save and to export as FBX

Hi I have a little concept city indoor playground
where I want to export all set items to UE5 from SKU

Till now, I have saved each of all with one file name
then I need to

open> delete all but that group
open again and export as fbx

Is there a way to save ONE group within a greater entity?
Without having to save all and then delete all but the needed group?

Thank you