I have a 166 item parts list. It's split on the drawing sheet at 1-114 and 115-166.
If I right click / edit part list, the window displays the entire part list. I export to Excel.
The Excel doc only contains 1-114.
If I unsplit, right click / edit part list, export, then undo (to "re-split")I get a full table in the excel doc.
I can't imagine anyone who wants to export their part list to excel wanting a partial list. Exporting from the BOM itself is a complicated option because you may have several extra columns/properties shown in the BOM that are eliminated from the parts list (mass, thumbnails, file names etc) that the shop floor doesn't need on their drawings.