Using Outlook for iOS for personal email and calendar management
Dear ChrisL999,
Good day.
I apologize for any inconvenience this may cause. The decision to retire the "Play My Emails" feature in Outlook for iPhone was made based on a number of factors, including usage data and feedback from users. Microsoft is constantly evaluating its products and services to ensure that they meet the evolving needs of our customers. For more information reference: End of support for Cortana - Microsoft Support
Play My Emails - Microsoft Support
At this time, there is no information available regarding a replacement or upgrade for this feature. However, I recommend keeping an eye on Microsoft's official communication channels "Microsoft Roadmap" Microsoft 365 Roadmap | Microsoft 365 for any updates or announcements regarding Outlook for iPhone.
In the meantime, if you want Microsoft keep this feature please feel free to post this in our Feedback community by visiting Outlook · Community (microsoft.com) as it is a community monitored by our Product team to help improve user experience with Outlook, via feedback given by our valuable customers.
For other concerns, please do not hesitate to add your post in the Microsoft Community Team.
Thank you for choosing Microsoft as your partner in business.SincerelyEben Ezer Tres | Microsoft Community Moderator