Salaamualykum, I would like this argument to be strengthened by criticism: Everything has a cause, by cause I mean mean something that "therefores it" regardless of your definition. if something happened without that, the therefore would be the fact it can happen in a possible reality, thus showing that this is impossible in a possible reality.
We know time exists as a line in some way, regardless of any physics model or philosophical suggestion, it can’t be infinite because it would take infinite time to complete, which is impossible. Infinity cannot end. Therefore the first thing that existed was caused by an uncaused cause as if that thing was caused an infinite regress would happen making it impossible, if something begins to exist you can apply second to it, which means an infinite amount of second would happen if there were infinite causes, thus the first thing to exist needs a cause that is uncaused so that time could be complete.
With that out of the way, the being is obviously transcendent and not physical, you can apply second sot physical things, the uncased thing is eternal, as it has no cause, a cause is needed. In every possible reality where something that began to exist it would have to have been caused by the first cause, and there are many different possible realities in which a different firstly caused thing would come to be, therefore the being is very powerful.
The being is transcendent as it isn't physical, physical things exist in time, so it’s powerful, eternal, and transcendent. The attack you can bring to the possible reality equating to power part is that there are mutlipe eternal causers, but this part is from ibn sina : "if A is distinct from B as a result of something implied from necessity of existence, then B would share it, too (being a necessary existent itself), and the two are not distinct after all. If, on the other hand, the distinction resulted from something not implied by necessity of existence, then this individuating factor will be a cause for A, and this means that A has a cause and is not a necessary existent after all."
Because the logical law is that no two things can be exactly the same therefore the possible reality part of the argument can be used to imply power, as only one first cause can cause the first thing to begin to exist. Thus there are not multiple necessary existents, and there is definitely one necessary existent, massively powerful, non physical transcendent entity.