Scrivener only has very basic text layout features. It cannot rotate content 90° to form a “landscape” table in the middle of a document that is otherwise portrait. I would suggest saving final table layout for the desktop publishing phase of the project at any rate. You’ll get better tables with more visual options, and can more easily make sure the table is on the right page, taking up the right amount of space. It’s difficult to do all of that with a system that is mainly a writing tool with very little concept of a “page”.