[Editing imported PDF figure directly in document (rather than <Embedded> tab)?]

Hi everyone,

I'm not a graphics designer by training, just a grad student trying to generate figures so I apologize in advance if I'm not using the correct terms. I generate most of my figures in python, then save as PDF before importing them in Affinity Designer for final assembly/adjustments.

The import works fine, however I can never directly edit the imported figure directly in the file I imported it to. Instead, when I click on the imported figure, a new tab opens up called <Embedded>, which contains only that figure (this is editable and changes are reflected in the original figure). I find this annoying, so I've been simply copy/pasting the figure from the <Embedded> tab directly into the original document, but this significantly reduces all line widths. Aside from having to readjust all the lines, it's very tedious to manually copy/paste each figure.

I was previously using CorelDRAW, in which it's possible to edit imported PDFs directly in the current file. Is there a way to do this in Affinity Designer?