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Try Nebo.

I've tried them all, including Concepts. Concepts was great but it requires subscription and it gets slower when you have a very large drawing. I tried large Goodnotes paper too, but it was a bit clunky.Nebo was good, but then I kind of stopped doing large notes.

Concepts is nice. Subscription model IIRC but I’ve been happy with it. Nice options for different papers, can cut and paste/transform objects. Has multiple layers.

Have also been using Concepts since I found it to be the best whiteboard app for me on Android. But last time I checked they had a one-time puchase option available? Did they change that?

How well does excalidraw work on an iPad? It’s my go to for whiteboarding anything

Just found out today that you can edit the page template in GoodNotes so that it's 5000pt x 5000pt, which is much, much larger than the default - at least for me that's close enough to having an infinite canvas

Miro works great, I really like the UI

Unfortunately Miro really is not too great with a Wacom on Desktop:(