G: As of my last knowledge update in January 2022, there isn't a direct "mark all as read" feature in the Apple Podcasts app. However, you can manually mark episodes as played by tapping the blue dot next to each episode. To quickly mark multiple episodes, you may need to do this individually or in batches.

Please note that app features can change, and it's advisable to check for any updates or changes in the app settings since my information might be outdated.