Not wishing to disparage the good name of "lawyersclubindia" and their guesstimates but OpenSecrets has him at just over $1M in 2018[0] and ThisNation has him at $900k in 2022[1]. (Neither sounds that plausible but they are definitely less shady than "lawyersclubindia".)

The only places that have him in the 10s of $M bracket look like spam content farms who've stolen the majority of their content from Wikipedia.

[0] https://www.opensecrets.org/personal-finances/charles-schume...

[1] https://www.thisnation.com/politics/people/chuck-schumer-net...