I don’t doubt that already have a couple of nukes (by supply) and that they have the technology to build more and are doing so.
I do. Their first test was something like 5 kilotons, which is pretty much a dud. If this is their fourth test, and it yields is 8 kilotons, (a dud) as one person mentioned, or 45 kilotons (a good yield) as another person mentioned, then they are hardly ready for reliable production of nuke warheads.
But I expect we will learn more about their capabilities directly, and then we can stop guessing.