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FBI Extracts Suspect’s Deleted Signal Messages Saved in iPhone Notification Database
(www.404media.co)
This is a most excellent place for technology news and articles.
You can export them from the Google authenticator app and import into something like keepassdx. Its a bit of a workaround doing such, having to read the data from the QR code but entirely possible.
https://www.keepassdx.com/
Mine sync between devices using Syncthing, merging forked credentials is easy enough to fix too with the desktop app.