If you would like to export for example search form banner (or any other section) from Home 3 to Home 1 here’s how to do it.
Open homepage version you want to export. Right click on section/container you wish to export and click “Save as template”
Name it and click Save
Then open homepage where you want to import that section. Scroll to the bottom and click “Add Template” (middle button)
Click “My Templates“, find template you saved and click “Isert”