Here is how metaphysiscs is defined in Metaphysics texbook by Peter van Inwagen (2009):
Metaphysics attempts to tell the ultimate truth about the World, about
everything. But what is it we want to know about the World? What are the ques-
tions whose answers would be the ultimate truth about things? There are, I sug-
gest, three such questions:
1. What are the most general features of the World, and what sorts of things
does it contain? What is the World like?
2. Why does a World exist—and, more speciﬁcally, why is there a World hav-
ing the features and the content described in the answer to Question 1?
3. What is our place in the World? How do we human beings ﬁt into it?
That's why I tagged those questions that asked,
What the cause the world exists and could it be different, what features of the world necessary.
Questions related to Anthropic principle, whether observer is needed for things to exist
Questions related to when was the beginning of time or whether time axis infinite.
Many of these questions are not physics, but since they were not deleted they should be properly tagged. It should be noted that metaphysics questions are not very welcome in Phylosophy.SE by their community and they often advise to ask in Physics.SE for a reason unknown to me.
I wonder why all those tags were removed. Please restore them.