Based on the source data [0] I think the number they're reporting is just the total personal income earned in each state. In California's case, per-capita income actually increased slightly, but the population went down so total income went down. In New York, both population and per-capita income decreased in 2022. Still sort of a weird number to report on though.
[0] https://apps.bea.gov/regional/zip/SAINC.zip, accessed via https://apps.bea.gov/regional/downloadzip.cfm