The Noahide Laws are Almost Completely Unbiblical
There is no explicit Biblical foundation for the Noahide laws. You will never find God saying to Noah in Genesis anywhere, "here are my 7 Noahide commandments to the gentiles." No such verse exists. It's a much later invention by rabbis in the rabbinic era to give gentiles a sense of moral code to live by, much like the golden rule but only with a few more 'golden rules' so to speak.
There are two commandments to Noah in Genesis. One is Genesis 9:4; 'don't eat the flesh of a still living animal.' This is considered a Noahide commandment.
The other can be interpreted as a Noahide commandment if you do a lot of twisting and turning of the scripture to make it apply to the concept of murder; this is Genesis 9:5-6. Even so, it's still obscure inasmuch that the "shedding of man's blood" could be justified in war and self defense as two examples.
Even the Torah agrees that if you killed a thief before sunrise there is no bloodguilt upon the one who has shed the thief's blood; Exodus 22:2. And there is plenty of killing and shedding of blood in the many Israelite wars against the surrounding tribal groups such as the canaanites to secure the promise land. Rabbis have decided to interpret Genesis 9:6 as 'murder' and called it a Noahide commandment.
What about the other 5 Noahide commandments? This is even easier to explain:
1. Do not profane God's name; Exodus 20:7 - not a Noahide commandment.
2. Do not curse God; Exodus 22:28 - not a Noahide commandment.
3. You shall not steal; Exodus 20:15 - not a Noahide commandment.
4. Do not commit incest, adultery and homosexual acts; Leviticus 18:6, 20, 22 - not a Noahide commandment.
5. Establish fair courts of law and serve justice; Leviticus 19:15 - not a Noahide commandment.
None of the other 5 supposed 'Noahide commandments' were ever given to Noah for the gentiles to live by. But rather, were laws given to the Israelites on mount Sinai by God through Moses. The laws given by God on Mt. Sinai only apply to the jews. Not the non-jews. So, Noahides are not bound to most of the supposed Noahide commandments! Meaning, there really is no explicit Biblical foundation for Noahidism and was just an invention during the rabbinic period.
This is because Judaism has no real explanation for what the purpose of non jews is. So, to all those that follow Noahidism, unfortunately, you've been duped by the jews. It was their attempt at trying to give you some sense of purpose in the world. But in reality, Noahidism is not built on any solid Biblical foundation whatsoever and is a poorly designed system for the gentiles at best.