Apple in the iOS 13.5 beta introduced a new Group FaceTime feature that's designed to disable the option that automatically enlarges the tile of the person who is speaking.
Group FaceTime, by default, has a dynamic view with a tile for each person. The person who is speaking at the current time has a larger tile, while tiles for people who are not talking fade into the background, a layout that's not always ideal.
In the FaceTime section of the Settings app, there's now an "Automatic Prominence" section with a "Speaking" toggle. Turning off the "Speaking" toggle makes it so the tile for the person who's talking in FaceTime won't get larger, allowing tiles for all people to remain the same size. Enlarging a person's tile can be done by tapping it, as noted by The Verge.
A grid with static image sizes for all participants is perhaps preferable for meetings and events where multiple people are talking at once or right after one another, and it mimics layout options available in Zoom and other video chatting apps.
The iOS 13.5 beta also makes it easier to unlock an iPhone with a passcode when wearing a mask by bringing up the passcode interface more quickly and it lays the foundation for the introduction of the exposure notification API that Apple plans to release for health apps in May.
