End to end encrypted, I think chat control is all about client-side scanning so the app being open source is a big deal and would prevent client-side scanning because even if they build in client-side scanning, it’s open source and people can remove it.
Signal is open source, so no it will always be available without chat control. https://github.com/signalapp
Good luck setting up your own server and convincing everybody else to use that.
Signal is not federated. It relies on a central server, meaning for all intends and purposes Signal controls the entire chain.
End to end encrypted, I think chat control is all about client-side scanning so the app being open source is a big deal and would prevent client-side scanning because even if they build in client-side scanning, it’s open source and people can remove it.