I could try to convert handwritten notes to text and then move it to Obsidian but my notes are often more like a mindmap and it is easier for me to open tablet and just read straight from there. So I use them separately: Obsidian for really short notes like 1-2 sentences to transfer from laptop which I would like to have accessible on the phone and vice-versa: to write something really short on the phone. Handwritten notes are my main source of data. This approach might not be optimal for everyone of course.