There is a workaround for this. You have to create a dual axis and add a transparent png as shape over it and a column header. I'm attaching a workbook with two different versions, one of them has a different highlighting effect which you may find interesting too.
Hope this answers your question. If does, please mark it as helpful and correct so other users can refer to it. Many thanks!
I'm also attaching the png. that you can use as transparent shape.