Continue to the question about the dome

I can't write the rest of the question in the question itself, so I'll continue here:
The lesson I was talking about regarding the dome is a head covering that is visible from all sides.
Second, how is it that by wearing a kippah, which is not considered the head covering spoken of in the halakhah, this is actually a continuation of the custom? After all, the custom is based on a certain standard that we do not currently adhere to.
I would be happy if you could answer another question of mine: Why do we still wear a kippah? It increasingly divides the people and puts us in a box and mold.
thanks.
Link to the first question – https://mikyab.net/שות/קיפה-2/#answer-8388