I’m not sure what they expected, not everyone runs and gets a new ARC just because of that immediately.
By chance I got a new ARC about a month ago and I got one which supports the mobile ID, but when I started looking into it how to set it up I couldn’t find a straight forward description, especially not in English. This is why I still don’t have it even though I was low key excited about that possibility.
I do that already. Actually my wife told me just to take a picture of my ARC front and back and show that instead of the real thing, and that worked for every place but the immigration office for the last 4 years.