Wouldn't even need to be the same application, just something that lets the existing data form a functional application. Could even plug into Amplify, Step Functions, etc
No, just a wrapper really. As you said, most of the heavy lifting is done by the AWS services. It needn't be high quality at all; just something that someone could download to not lose all of their work.
Of course I meant "two weeks" as something more or less metaphorical - could be 16 weeks, and a 2-pizza team, given the amount of time until Honeycode shuts down. I just think Amazon has the resources to do that.
If I was a competitor like Retool I'd be building a migration tool right now.