OneNote pen-writing lagging. There's nothing wrong with the pen as it works relatively fine for Adobe and works on the Edge pdf thing as well

Apple Pencil and OneNote: A Complete Guide for iPad Users

Draw and sketch notes in OneNote

Empower your students to learn, collaborate and work on the go with their own digital notebook, Microsoft OneNote. | Microsoft Education

Once you’ve gotten set up with Microsoft Teams, the next step is to start building your OneNote Class Notebook. Learn how to manage sections for students and teachers in this tutorial. https://msft.it/6186T52pI | OneNote Education