If you're taking the approach that iOS browsers are just re-skinned safari, then Edge doesn't count as it's own browser on desktop.
Edge could just not compete with chrome, despite throwing hundreds of engineers at the problem. They tried, and tried, and tried.
In the end “edge doesn’t work” was just code for “edge is not chromium”
Electron was and is still a separate beast, Microsoft doesn’t even need to deal with that: third party developers do, they have to ship the binary.