Earlier quoted context omitted.
Foundations don't really do maintenance on products. Electron is maintained by a few people at Slack at one or two at Microsoft. Of course if you count the Chromium codebase then it is indeed "Google's framework" and they do nearly all the maintenance.
Not sure if this is trolling but Electron is a big open-source community project NOT "maintained by few people at Slack and one or two at Microsoft", you can easily check that by going into repository insights and seeing the correct information which for the last 30 days is "25 authors have pushed 52 commits to main and 267 commits to all branches". The Chromium take is even bolder, it is indeed NOT a "Google's frame…
The Chromium stats are misleading for the same reason. Almost all commits are made by Googlers. There is a long tail of contributors over the years outside of Google but that doesn't mean their contributions are equally sized.