Galaxy Chromebooks allow you to run four types of applications. First, you can run progressive web apps (PWAs) by installing them from the Chrome web browser. Second, you can run Android apps by downloading them from the Play Store. Third, you can run Linux apps (using the Linux development environment) by downloading those apps from the internet. Fourth, you can run desktop games by downloading them from Steam.
As you can see, you have to download the four different types of applications from different places. In other words, there’s no one place from where you can find them all. Well, Google might be working on solving that inconvenience for you.
According to a new report from 9To5Google, Google is developing ‘App Mall’ for ChromeOS. The marketplace will most likely offer PWAs as well as Android applications. The publication says that when you click on an app in this marketplace, it will take you to a website that Google is developing (discover.apps.chrome). From there, you will be able to download the app. Reportedly, App Mall will be locked behind a flag during early testing.
At the moment, there's no information about when Google will make App Mall available on ChromeOS. However, going by the feature rollout history of ChromeOS, the new marketplace should be available to everyone in the next couple of months.