They must have been deployed there for some time.
Since there are no reports about them being used on any target, they apparently were deterrance of a stupid move by the Turks (the most likely addressee due to reach). Why the hysteria?
It’s more than double the assumed range of these missiles from the Syrian border to Istanbul. But Ankara might just be within it, as are all the cities in Lebanon and Israel, Amman in Jordan, and northern Saudi Arabia and western Iraq. Their presence might cause some alteration in everybody’s plans and behavior in the region. My guess, and it’s only that, is they’re especially intended to keep Saudis and the Turks honest.
I don’t know why the hysteria. I suppose the Israelis just don’t have the same cavalier attitude that some folks have.