So let's look at this logically.
Iran has actually built a bomb.
And via formal, official channels, we the general public have heard and seen - nothing.
No televised address from POTUS, no highly credible leaks from Defence sources reported in authorative mainstream media outlets - zip.
In an age when it is impossible to even keep secrets about some of UKUSA's most sensitive SIGINT capabilities?
I think when they really do develop a bomb - we'll all find out about it quickly enough.
Let's imagine what would happen if the daily intel brief landed on the desk in the Oval Office, and the topline issue was "Iran demonstrates working nuclear warhead - miniaturised to fit on ballistic missile."
What would we see?
At the very least I would have thought, a sudden and very marked increase in shuttle diplomacy, and an emergency UN Security Council meeting? NATO convening all sorts of meetings?
Significant changes in force postures all across the region?
Relocation of all sorts of defence assets?
And then the leaks to well informed journalists in the US would begin - while their brethren in the UK were slapped with D notices preventing them from disclosing anything sensitive?
Somehow I don't think it's happened - yet.