For number 1: You should be able to export to CSV on IOs and I think this is on the works for Android too.
For number 2: Digital receipts has been discussed in this forum before and there is a third party company looking into a possible solution but it’s not as simple as it sounds. More info elsewhere in this forum but the problem is that it is hard for Monzo to work out what the money was spent on, they would need to get this information from somewhere else as this is not currently passed to them by MasterCard when transaction is being processed. As a solution to you specific case, you could take photos of the actual receipts and attach them to the transaction, you can then search them at the end of year. I have written a very small script utilising the public API which pulls all expenses between two given dates and prints their information and attached photos to PDF.