

You are the center of the universe. A star, 2 billion light years away is also at the center of the universe.
Everything that is everywhere originated from the same infinitesimally small point that stretched out in to the universe we observe today. It’s not like a grenade going off, where you can point to a center and an edge. It’s more like proofing dough.
IF that is true, that means any “edge” to the universe must also exist at it’s center, and therefore be surrounded on all sides by the universe. It would look more like a 3 dimensional hole than a bubble we’re inside of.

No. They are not.
Kitchen appliances like blenders and mixers are going to draw more power than USB-C is capable of delivering even at their lowest settings.