Yes. You can edit or delete a Food update, after it has been sent, on both the Kriyo mobile app and Kriyo web.
Go to History → School Activity Log, tap on the Food update you want to change, then tap the Actions (right chevron) button at the bottom right. You can choose to edit or delete the update.
Go to History and click on the Food update you want to change. A pop-up will open. In the pop-up, click the Actions button on the top right to edit or delete the update.