"Mesh-Insertion" or "Kitbashing" from Asset Browser

Now that Blender 3.0 come up with great Asset Browser it's time to have " Kitbashing " or " Mesh Insertion " like functions with it.
inserting and welding presaved models into present mesh's selected faces in " Edit mode " to add detailed

of course welding asset must have open edges or some how defined edges or faces...

KIT OPS 2 Blender kitbashing add-on that is already done but this one is not welding I guess, just boolean from main mesh and...

an other sample of an add-on in other applications that uses this function.