Hi, I'm a Microsoft employee and own the certification for apps. Electron is allowed. I checked with my team
it. The failure is related to browsing capabilities which have to comply with 10.2.1.
That kind of transparency really helps build confidence in Microsoft Store as a platform. It's important to show that the team is accessible (and, frankly, human). It also helps to correct misleading narratives (e.g. "MS Store doesn't Electron apps").
We were eventually approved!!! so if you had any impact here I really really appreciate it!