Depending on the feedback, the lock screen feature will be rolled out to other regions soon.
Simply hover over the Instant Arcade game and go for the Play Now button.
This feature can be toggled off in the Stores controls page.
Windows 11 Build 22635.3061 (Beta) Brings Windows Share, Lock Screen, And More
Microsoft's Windows 11 Insider Preview Build 22635.3061 for Windows Insiders in the Beta Channel brings new features, improvements, and fixes
