I’m 25 with $500k in index funds and 11 rental units generating $3,500 monthly. Am I actually financially independent?

Cody Berman went on The Personal Finance Podcast and described hitting financial independence right before his 26th birthday. He held about $500,000 in a Total Stock Market Index Fund, plus 11 rental units purchased with $200,000 in down payments. The real estate produced "between $3,000 and $3,500 a month in cash flow after everything was... I'm 25 with $500k in index funds and 11 rental units generating $3,500 monthly. Am I actually financially independent?