This video explains how to generate sales details in Odoo 14 POS Community. All you need to do is go to the reporting tab under Odoo POS and select the option - sales details.
Upon clicking you are navigated to a new window where you can add the start date and the end date for sales details. Via entering the dates, you get instant access to sales details running within a specific timeframe. You can print the sales details by clicking the Print button.