[superq]

I don't know if you're specifically referring to X, the artist formerly known as Twitter, but regardless, no; iMessage runs with unique privileges and capabilities that are not available to ordinary messaging services.

[dhritzkiv]

Like the other comment pointed out, I understood 'X' to mean a stand in for iMessage. It didn't occur to me that we were referring to FKA Twitter

[throwaway290]

X is a common variable/placeholder like A, N or foo. Nobody is using it to refer to x.com unless it is a thread about Musk/Twitter

[olliej]

Sorry I forgot the most recent musk idiocy. X was a stand in for any other functionally always on and receiving service, messaging platforms are the primary example.

I'm actually now curious whether the various awful web notification standards allow images?

[saagarjha]

No it doesn’t.