I tried replacing my work laptop with an iPad Pro 12.9 for a year. It was great for email, Docs, Teams and OneNote, and the external monitor support is decent now, but in bright sun it’s only really usable in shade. I ended up moving to a Surface Pro 9 i5 because it’s fanless, wakes instantly, runs full Windows apps, and the pen in OneNote feels the most natural when I’m scribbling during meetings.
If you stay Android, make sure the USB‑C does DP Alt Mode for true extended desktop and test OneNote inking before buying. When I upgraded, I used a UK comparison site to sell my phone, freepost and a quick bank transfer made it painless.