Meaning and Interpretations of "You shall not boil a kid in its mother’s milk"?

I was curious as to why it’s not kosher to consume/cook meat and cheese together, so after looking it up, everything online referred me to this quote from three different Torah verses (Shemot 23:19, Shemot 34:26, Devarim 14:21). However I don’t understand why: “You shall not boil a kid in its mother’s milk” is interpreted to mean: “no cooking and eating meat and cheese together”. I seen some people saying that it was originally meant to be a ban on the commonly practiced Canaanite ritual of boiling a kid in it’s mother’s milk, which would seem like a pretty straightforward and literal interpretation. Some people said that it’s an idiom and means that: you shouldn’t mix things that give life (a mother’s milk) and bring death (boiling a kid). One thing that I noticed about the phrase is that all three times it appears it’s never a verse by itself, it’s all way said after a verse, so maybe those verses are context on what it means?

Shemot 23:19 “The choice firstfruits of your soil you shall bring to the house of your god, YHWH. You shall not boil a kid in its mother’s milk.”

Shemot 34:26 “The choice firstfruits of your soil you shall bring to the house of your god, YHWH. You shall not boil a kid in its mother’s milk.”

Devarim 14:21 “You shall not eat anything that has died of a natural death; give it to the stranger in your community to eat, or you may sell it to a foreigner. For you are a people consecrated to your god, YHWH. You shall not boil a kid in its mother’s milk.”

After reading all three, I would agree that it does sound like an idiom. The first two seem to mean something along the lines of: “sacrifice the best and youngest of your livestock to the tabernacle/temple.” and the third seems to mean something like: “Only eat (properly) slaughtered meat.”

I’m going to be honest, I’m not a scholar/rabbi. I have no idea if I’m interpreting this correctly or not. Either way, I still don’t know how “don’t eat/cook meat and cheese together” came from this, maybe I’m missing something. What do you guys think? Any rabbis that can lean in on this?