Samsung thinks developers are the market for Linux on Galaxy, because that means they 'get a full-featured development environment with all the advantages of the desktop, at any time and any where? ' Samsung's announcement implies that developers will 'code by phone and with Samsung DeX, then continue work on the big screen'.
It is not known when Linux on Galaxy officially launched. Samsung says they are still "in the process of development" and users can sign up for email notifications if interested.https://seap.samsung.com/linux-on-galaxy
Maybe many Linux users want to run their favorite distribution on the phone. But the idea of code developers on Linux with a 5inch screen looks a bit far-fetched. Laptops today are also quite good and there is an Android emulator on it, so I don't know what future they will choose.