This article[1] by the Dutch DPA has some details about it: The Privacy Shield was invalidated in 2020, leaving only the Standard Contractual Clauses as a valid transfer tool. Uber stopped using Standard Contractual Clauses in August of 2021, before adopting the new Privacy Framework in 2023. For a period of two years they were transmitting extremely sensitive information without a valid way to do so.

[1]: https://www.autoriteitpersoonsgegevens.nl/en/current/dutch-d...