Apple does encourage streaming apps to use Safari, they even worked together with Amazon to improve Safari for game streaming: https://www.engadget.com/luna-ama

Apple does encourage streaming apps to use Safari, they even worked together with Amazon to improve Safari for game streaming: https://www.engadget.com/luna-amazon-cloud-gaming-interview-pwa-apple-173948922.html https://www.engadget.com/luna-amazon-cloud-gaming-interview-... So no, they are not going to block websites.