The last Mishna in Chapter 7 of Chulin as translated by Sefaria.org states:
The prohibition of eating the sciatic nerve applies to a kosher animal and does not apply to a non-kosher animal. Rabbi Yehuda says: It applies even to a non-kosher animal. Rabbi Yehuda said in explanation: Wasn’t the sciatic nerve forbidden for the children of Jacob, as it is written: “Therefore the children of Israel eat not the sciatic nerve” (Genesis 32:33), yet the meat of a non-kosher animal was still permitted to them? Since the sciatic nerve of non-kosher animals became forbidden at that time, it remains forbidden now. The Rabbis said to Rabbi Yehuda: The prohibition was stated in Sinai, but it was written in its place, in the battle of Jacob and the angel despite the fact that the prohibition did not take effect then.
Rambam comments: And pay attention to this great principle (quoted in this Mishna as the authoritative view). Namely, from Sinai the sciatic nerve was forbidden. And you should know that whatever we refrain from doing or (alternatively) do today is only because of Hashem’s commandments to us via Moshe (Moses), not because Hashem commanded it to the prophets that preceded him.
For example, we refrain from eating the limbs from a living animal not on account that Hashem forbade the eating the limbs from a living animal to the sons of Noah; but because Moshe (Moses) forbade us a limb from a living animal via what was commanded at Sinai that such a limb would remain forbidden. And similarly, we do not circumcise on account that Avraham circumcised himself and the people of his house, but rather because Hashem commanded through Moshe that we circumcise, just as Avraham, peace be unto him circumcised; and so too the sciatic nerve, we are not continuing this practice because of a prohibition by Yaakov our forefather but rather on account of the command of Moshe Rabbeinu.
Be aware that they said 613 commandments were told to Moshe at Sinai and all these (commandments stated above) are part of the commandments.