As a Californian, this is mostly just propaganda. Yes, immigration doesn’t affect Medicaid eligibility, and yes that’s a good thing, but if you aren’t low ENOUGH income for Medicaid, coverage is expensive.
Also as others have noted (and more directly addressing OP) California isn’t anywhere close to a single payer system. We have a marketplace of private insurers like everybody else
Not me but my friend technically made the world’s biggest chicken nugget. Turns out getting Guinness to certify it is kind of a pain though so it’s not on the books