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An Open Letter to Google regarding Mandatory Developer Registration for Android App Distribution
(keepandroidopen.org)
This is a most excellent place for technology news and articles.
Also kupfer (pmos but arch), ubports (ex Ubuntu touch) and droidian (similar to ubports with being halium-based but Debian and conventional DEs, hence, it's supposed to actually run software). Mobile-nixos, to some extent, although it's more of a PoC, in my experience