Announce Notification (without headphones) not working on iphone 15 Pro rinning iOS 17.1.1

I used to have Announce Notifications enabled for GMail. I upgraded to iPhone 15 Pro and the notifications are no longer being announced unless I have headphones on. I used to have notifications announced on speaker with my earlier phone. I have tried verified I have the right settings and have tried with different apps. Notifications are being announced only if I have my headphones connected. Is this a ‘new feature’ or ‘known bug’ with the iPhone 15 Pro or the latest iOS?