Officially flash will no longer be supported or available for download on December 2020 per the Adobe site EOL announcement. More information and an official uninstaller is also available here with detailed instructions. Please note the special statement at the header of the page on the second linked site:
These instructions are NOT applicable to Flash Player included with Microsoft Edge or Internet Explorer on Windows 8 and later or with Google Chrome on all supported operating systems. Please visit the Flash Player Help page for instructions on enabling (or disabling) Flash Player in various browsers.
Cheers