I can speak to the results from Long Island, NY.
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I don’t know the exact demographics of each team but I know the towns / villages / hamlets that make up the school districts and will draw assumptions from there. The way the LI title is determined is the winner from Nassau County (closer to NYC) vs the winner of Suffolk County (further from NYC). I is the largest schools and IV the smallest.
Massapequa - 95% White. Known for large amounts of upper middle working class Italians and some Jews.
William Floyd - yearly power house. Lower middle working class area with some slums. Brock Jackolski played here. Probably 60/40 White.
Garden City - Upper class / rich WASPY village. Team likely 95% White or more.
North Babylon - middle class area with creeping diversity in last decade. I’d guess team is majority White but could be 50/50 at worst.
East Islip - Upper middle working class White hamlet. Team should be 95% our guys.
South Side - Rockville Centre is a pretty rich village near the NYC border. I’d guess team is 90% White or so.
Bayport-Bluepoint - upper middle to rich group of hamlets. Has to be 95-99% White.
Seafood - right next to Massapequa with similar demographics. 95% White.
So almost all the top teams are White super majority to majority. LI has some very black school districts. Hempstead, Roosevelt, Wyndanch, Freeport, Amittyville and Central Islip would have basically all black teams. I guess they didn’t have enough upside this year to compete with stiff-hipped lunchpailers.