Perhaps you have a linkee to your conjecture website.
I doubt it, though.
The precincts comprising the new district existed in 2020 and can be tabulated.
Honestly. It means that if the district existed...in other words, you take all the precincts that are in the new district and add up how each precinct voted and just like magic, you know exactly how the district voted in 2020. All districts are redrawn every 10 years and how that district voted is recalculated.