A casino lobby may look like one screen, but it connects separate game-provider...

https://fernandosmastercolumns.swiftnestly.com/posts/why-do-casinos-test-layouts-across-devices-instead-of-just-one

A casino lobby may look like one screen, but it connects separate game-provider integrations, balance records and payment updates. These systems must stay in sync, so launching a game or checking a deposit depends on clear handoffs behind the scenes.