I having been using obsidian for my university notes for the pass 3 years on my desktop. My process of taking notes would be to summaries the class ppts and textbook notes into singular obsidian files and then export it into PDF from obsidian itself for my final study and revision notes. I love that the desktop has the feature to export the html text (obsidian file) to PDF .
But now work has become hectic and I do my note taking in the classroom and most of my studies in the library on my iPad i would like the option to export to PDF on the mobile app and iOS app.