Created it from what?
In theism and deism there are two lines of argument.
Well there are two types of creators or causers in philosophy primary and secondary
Firstly there are people like Plato and some christian theologians which have God as a kind of sculptor who shapes and directs some fundamental pre existent energy which would otherwise be completely uniform and inert, needing division and dynamism to distinguish it from the non existent which would actually be nothing while pre existent matter would just be busy doing nothing. God here would be a secondary creator.
All that of course doesn't sit well with the alternative type of creator the
primary creator, powerful enough to bring matter into existence. Here existence is owed to the will and power of God since there is nothing, except non existence, outside of God.
So things exist because God exists.
I suppose the question remains as to how God pulls this off and this is where simulated universe thinking can help us out.
Here the universe is created in the universe of the simulator or universe of the 'creator' but it's empirical reality it's physical nature
emerges out of that ''other'' universe while being totally dependent on it
In the ''universes'' we simulate today the processes that define those ''universes'' emerge on screens refreshed at 50Hz per second. The processes in the simulated universe emerge in an independent time dependent on the programming.
What might a universe existing but whose existence is constantly refreshed look like? Perhaps at a fundamental quantum level, virtual particles coming into then popping out of existence, with the bigger perspective maintained.