California, Colorado, and New Jersey would be dem manders each with two republicans
NJ isn't too far off from what a Dem gerrymander would be. It was a purposeful decision to weaken Malinowski to shore up Sherill and Gottheimer. And Malinowski's seat is still Biden +4.
There used to be dreams of drawing out Van Drew, but I doubt a Democrat will be elected there for a long time.
What would an actual Gerrymander look like?
I assume two GOP sinks - one in Northern Jersey, one in South. Or two in South, none in North. Perhaps three - 2 south, 1 north. In all cases, the rest of the seats would at least be Lean D.