Recently ive been playing with fusion 360 and a slicer plug in for it. The plug in works well with the glowforge because it lets you input you material size. This feature tells you how many sheets of that size you will need for all the slices and fits them all within that size. This is nice for us because it also exports the PDF pages to be that size so they arent just normal a7 paper sized. However the GFapp will only upload the first page of a PDF. Sure you can convert every page manually to svgs but when you have a ton of pages that would start to add up.
The solution I found was to edit the pdf by switching which page was on top then uploading the pdf over and over again until every page was in. Adobe charges you for this feature but I found this free web app that works really well. https://www.pdfescape.com/open/
Heres my first attempt, its not perfect due to its small size my second one will be bigger.
im sure you have to pay for it. Adobe doesnt let you do anything but view PDFs without paying. thats what led me down this path. Splitting may also work, I just prefer to keep them all as a single file. Thats just me though.