Orion is currently sharing pdf files as links. This is also the default behavior of Safari ever since iOS 13 or 14, but at least with Safari you can change it into sending the pdf as pdf with no need to download it in the app you're sharing it to again.
Before, Safari only shared pdf as pdf and I hope Orion can be changed to do so as well. This is especially useful for students and the likes who download pdfs from sites that need a login and where sharing the link to the pdf won't help at all, since you can only transfer such pdfs if you can directly send the pdf, instead of its link.
The bad thing with Safari currently is that you have to set this option "Send as pdf" for every single file. If Orion could do that by default that would be great.