Hi and thanks for reaching out! I'm an Independent Advisor and a Microsoft user like you. Please allow me to assist with your issue.
IE Mode in Edge Chromium will support Active-X controls. However, IE Mode is targeted for enterprises -
https://docs.microsoft.com/en-us/deployedge/edg...
You can choose to enable IE Mode by following this article, but that will require Edge Dev channel -
https://winaero.com/blog/enable-ie-mode-chromiu...
The recommendation is to move away from Active X for consumers.
Regarding Flash Player, you could follow this article to enable Flash in Microsoft Edge.
https://support.microsoft.com/help/4532571/micr...
Please let me know if I can help you further!
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.