Not sure what the fuss is. Any company publicly registered in the US has to provide a reconciliation of its income taxes. Netflix 2021 1.0-k can Be found here: https://www.sec.gov/Archives/edgar/data/1065280/000106528018...

The relevant section is Note 10 Income Taxes which starts at the bottom of page 57.

The biggest drivers of the reduced taxes were stock options and the Tax Cuts and Job Act (TCJA). Stock options are just timing while I presume the TCJA are true credits.

This is not a mystery.