Adobe Flashis now bundled with Edge.
So this issue is solved.
@Tom If you look at the website that you posted, then you see that all 3 editions have the new edge icon.
You see this icon also in Help -> About:
So you should use the 3 icons on the website for the new edge.
Or - if you want to use only one ion for all editions - use the new icon found here:
https://www.microsoftedgeinsider.com/de-de/welcome/update?channel=dev&version=80.0.320.3