I used to parse PDFs using the Allenai method and the layoutparser.
This worked in many instances but is no longer maintained.
I still have Nougat on my to do list while a new paper now points to AceParse
AceParse includes various types of structured text, such as formulas, tables, algorithms, lists, and sentences embedded with mathematical expressions, among others. We provide examples of several dataset samples to give you a better understanding of our dataset.