Programming note:
If anyone has downloaded the PDF, it was created with Inkscape 1.2 using multipage option.
It opens just fine in Acrobat but if you want to modify I have found that when I open it I get a grey desktop.
I found that if you open new document and then import the PDF it gives you a clean SVG to modify. (you can delete blank page and the instructions with the page option- the bottom of the left tool bar)