It troubles me to learn that the iPad app has no ability to export data, but I’m also more disturbed that you spent two years plowing data into a tool without ever contemplating the possibility you would need to export or backup the data. User should consider the value of their data commensurate with the risk of losing it.
Two reasons -
The vast majority of users have more than an iPad so exporting is a near-100% given. In fact, it’s not possible to use only iPad to build moderately complex apps in Airtable. They assume every mobile app user has at least one other way to use Airtable.
Software that has a full contingent of ways to export data do not typically warn users about fringe cases.
The remedy, of course, is to simply access your base via a web browser and export all of your data. If that is not possible, you simply need to ask support to help you export your data and send it to you in some manner. I’m sure Airtable will accommodate this request.