This is such an odd restriction for IT staff. Normally HR gives you a form to sign agreeing to working remotely sometimes and having company data on your phone because you know, servers are meant to stay on all the time? It must be nice living in a world where nothing bad happens after hours.

If you’re using 365, OneNote can sync to the mobile app and vice versa. This will all depend on how your company sets up MDM\MAM but if the 365 suite is MAM enabled you could install that on your personal iPad. You wouldn’t be able to copy to\from your physical device, but everything is synced up to SharePoint so that’s all you would need access to.