OpenAI before ChatGPT (or even now) isn't even in the same ballpark with Google, MS etc as far as regulatory oversight goes.

Google has far too many services and products which are always touching the boundaries defined by the EU privacy laws. they trip the line with anything and the regulators can make it much harder/costlier for Google to do business in EU.

When the EU wrote the law targeting American Big Tech companies for compliance, OpenAI wasn't on their radar. Google was. So Google has to comply with a more onerous regime than OpenAI (for now).

Funny enough, OpenAI to this day violates EU requirements on price advertisement by charging VAT on top of the advertised price. They still owe me and every other customer in the EU ca. $3 VAT for every month I've had the ChatGPT subscription.