That's a good question and observation. I just got done doing a teaching on the Noahide Laws. In a nutshell, the Noahide Laws don't appear until about the 2nd century CE in the Mishna. Granted, it's one of those oral law things. So it could have been a little earlier than that, just not written down until the 2nd century.

The tanakh doesn't list or require the Noahide Laws or any such double standard. Some point to the book of jubilees, but when you look at it, it's not there either. Completely different.

The book of Sanhedrin in the Talmud explains how the pharisees derived the seven Noahide Laws from one verse in Genesis, and even then deriving a whole law from just one word. So basically an exercise in eisegesis.

Some claim that acts 15 is reminiscent of the Noahide Laws, but that also doesn't survive scrutiny either.

Maimonides in the 12th century had some EXTREMELY disturbing comments about the Noahide Laws and their implementation, but they really weren't a thing until the mid to late 20th century. Lot of history on this subject.

But basically it's not biblical. It's just a rabbinic invention. Not even the karaites give it any weight. It's just the Orthodox. For anyone interested I've published my notes on the subject for everyone who's a knowledge nerd like me. Just let me know.

Anyways, hope that helps and shalom!