@ansuz the notification provider isn’t able to decrypt your messages - that’s the catch. The messenger on your device can decrypt the message and send a local notification for you which normally none else can access 😅
As for the consent - yeah that’s the grey area here.. Notifications is a core service but access to that data shouldn’t be allowed to anyone really.
But it’s hard to say if all of the messages you get would classify as personal data (think things like WhatsApp news broadcasts) but generally they can’t be classified either without scanning the content and then we spin in a nasty circle 😐
The DMA has its good ideas - no arguing on that- but certain areas still feel problematic / not completely thought through (like scope of application.. gatekeepers are obligated, non gatekeepers aren’t.. why not apply it equally to all businesses that provide comparable services or technologies?)