On the other hand, your government can subpoena and read your push notifications, so…
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The notification can be
🔔 You have 2 unread messages
This is a developer decision. I think most users still prefer message previews and don’t think about privacy.
Push notifications can be sent encrypted, and then decrypted on the client side.
Yep, Amethyst's push notifications are GiftWrapped (DMs are triple wrapped), dates are random, and the receiver's pubkey is removed. There is no way for the push network operator to know anything about it. All they know is your device token.
Sure, they might face regulatory pressure to KYC device tokens, but at that point you can just set up your own Notification server.