Adobe included a built-in kill switch in later versions of the player that prevents Flash content from running in any browser after January 12, 2021.
Many sites claiming to offer a "latest version" of Adobe Flash Player for Windows 10 are actually distributing malware or adware. Since Adobe hasn't released a global update since late 2020, any "new" versions found on unofficial sites are unauthorized and dangerous. Adobe Flash Player End of Life Adobe Flash Player Download For Windows 10 64-bit
Microsoft permanently removed the Flash Player component from Windows 10 through Windows Update KB4577586. Adobe included a built-in kill switch in later