Microsoft just released a preview update to Windows 11 that ads an advertisement for Game Pass within the Settings app. The update will make its way to general users next month if testing goes well.

source https://www.windowscentral.com/software-apps/windows-11/the-wait-is-almost-over-windows-11-will-finally-feature-an-ad-for-game-pass-in-the-settings-app-next-month