The review process for Apple Podcasts can vary. Generally, it can take between 24 to 72 hours. However, it could be shorter or longer depending on various factors. If your podcast complies with all of Apple's content guidelines and technical specifications, it's more likely to be approved quickly. If you're submitting your podcast for the first time, it may take a bit longer as Apple checks to make sure everything is in order. Once your podcast is approved, updates you make to episodes or show details should appear within 24 hours.