I thought that was the point? PDF usually stores the position of every letter so that pages appear the same when printed, but it is wasteful and does not scale between screen sizes. So EPUB stores just formatted text, which can be rendered at any font size or screen width.
You can have fixed content as well, but it needs to be flagged in the document- for example, for illustrated books, or cover, title, and cpr pages.
Op needs to talk with whoever is doing the conversion and tell them what they want. But it’ll probably drive the cost way up- especially if it was automated (and it probably was/is)
@ChaoticNeutralCzech@feddit.de when you try to read a pdf on a smaller e-ink reader, everything is reduced and almost ineligible. You want to preserve the main features (boxes, italics) but being able to have a fluid format
@alvaro@social.graves.cl Well, that’s what I figured. You technically can preserve formatting on EPUB but why would you? It's not what the format is for, and most readers can support either. If yours doesn't, look for apps or a software update.
Really, there isn't anything. As others have said, it's a limitation of the format. Best you can usually do is convert to a word processing file and redo the formatting manually (assuming you know what that formatting was). It's a pain in the ass if you're trying to improve pdfs of old, out of print stuff. If it's your own files and you just lost the original word processing files, it isn't as bad because at least you have memory to work from.
I had a same issue for my kindle. What I realized what the source pdf should be good. For example I used to use 1-2mb pdf size for conversion, but it used to break in text or alignment.
Now I pick 10+ mb sized pdf instead.
Essentially people who make heavy weight PDF files save it as full adaptable file size without reducing its qualities.
The official Adobe online converter always gave me the best results, I used it for invoices with tables and odd formatting all over. They have limits on free, but it should handle a small book.
Not direct to epub, however.