Some scenes not showing in LayOUT?

When I am in Layout and I insert my sketch model into the view port, I go to the scenes option to put in the scene that I want. Some of my scenes do not show up in the list. The most recent scenes that I created are not shown. How do I get them to show up?

Probably need to save the SketchUp file and update the reference in LayOut so it sees the changes you made.

How do I “Update the reference in LayOut”"

After you save the changes in SketchUp, right click on a viewport and choose Update Model Reference. Or select a viewport and in the Sketchup Model panel, click on the Update button in the upper right corner. Or in File>Document Setup select the .skp file and then click Update.