In order to access GL flash content beyond the year 2020 , you have to perform the following tasks.
Note: below's workaround is just one option by using the Firefox portable browser. Other options exists which are mentioned on external sources
example:
https://blogs.windows.com/msedgedev/2020/09/04/update-adobe-flash-end-support/
https://docs.microsoft.com/en-us/deployedge/edge-ie-mode
FireFox Portable Version incl. Flash
In rare cases it is required that you need to uninstall the flash plugin completely before you can use the portable workaround. Microsoft offers dedicated windows updates for this.
https://www.catalog.update.microsoft.com/search.aspx?q=4577586