Theres basically a lag in these statistics. You won’t see what’s happening now until it’s progressed further, and then another 15 years for the children born under those circumstances to grow up. And violent crime is actually beginning to rise again since 2016 IIRC, so I wouldn’t hold on to the idea that we’re going to be at this all time low for violent crime for much longer.
The generation whose parents divorced is already grown. The data about them are known and counted in those data. Lag already passed. There was no surge of divorces in 2000 either.