Those Anøm phones didn't even pretend to be at all secure.
Pixel 3a with an Android 9 fork still on the March 2019 security patch. Shipped signed with the publicly available AOSP test keys used as a placeholder before signing actual releases. All of that visible in Settings app.
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Someone helped us get information on it including screenshots. The data they provided was deleted to protect their identity so we won't be publishing the screenshots they provided.
It was to determine if they were forking GrapheneOS as some had claimed and they clearly were not.
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Fair enough. I was hoping that you actually had one of the devices, and I was going to ask how you managed to get it :)