There is Goodnotes, which supports such functionality for PDFs. I’ve purchased such PDFs (bullet journal calendar/notes) and, without trying it, I think it a sa

There is Goodnotes, which supports such functionality for PDFs. I’ve purchased such PDFs (bullet journal calendar/notes) and, without trying it, I think it a safe assumption that Goodnotes could consume what is generated by the Hyperpaper link above.