Hi, thanks for reaching out.
The page in your screenshot has been built in the Block Editor. If you wanted to migrate Page Builder blocks to the Classic Editor you could do so by exporting the block in question by clicking on Layouts > Import/Export > Download Layout within the SiteOrigin Layout Block. A JSON file will be downloaded to your desktop. Next, you’d need to install the Classic Editor plugin. For now set your default editor to the Block Editor and enable opening pages in both Classic and Block form. That can be done at Settings > Writing. Next, open the page you’re migrating in the Classic Editor, clear the contents, click on the Page Builder tab and import the JSON file from Layouts > Import/Export > Import/Layout.
(By default, Page Builder opens new pages in the Classic Editor plugin. The page will default to the Block Editor if the page is saved without Page Builder data or if the behaviour is disabled at Settings > Page Builder > General.)
