A casino lobby looks like one screen, but separate systems do the work:...

https://coinsniper.net/blog/behind-the-casino-lobby-the-technology-that-makes-online-play-run-smoothly

A casino lobby looks like one screen, but separate systems do the work: provider integrations load games, balance records track wagers and wins, and payment status shows whether a deposit is pending or complete. The interface hides those handoffs.