This beta does isn’t accepting any new testers right now. OK
Looks like Apple does not like opensource encrypted communication apps
Testflight for old app seems to have expired, but the new version is in heavy active development. I'm sure a new Testflight will be up sometime soon.
In the meantime, early alpha Android builds can be found here: https://wn-when-apk.pages.dev/
In the meantime, early alpha Android builds can be found here: https://wn-when-apk.pages.dev/