I don’t think so.
Even if the impossible had happened and the confederacy had attained official recognition I doubt that they would have lasted long. They had a proven track record of being liars and thieves so no country would ever be able to trust them.
They craved the same territories as the union so conflict with them would be inevitable. They were like the proverbial grasshopper - enjoying the fruits of other’s labors so without any infrastructure to speak of they would be at the mercy of any number of interested predators.
I suspect that the Brits would be first in line to dispose of the slavocrats and reap the spoils.
Geeze, look at your view of history! Washington, Jefferson, Madison, Mason, etc.
I figure that the Slavocrats would have been allied with Germany, with the rest of the US being allied with Britain and France. Germany wasn’t prissy about things like that.
Consider trench lines in front of Richmond, augmented with barbed wire instead of abbatis, and Maxim machine guns instead of Gatlings, and a huge battle with a mine going off.