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A God Is You if it's a video game?
God Tropes has a wide selection of related tropes.
If the MC is the monotheistic God and there are no other gods in the setting, God.
Our Gods Are Different for general discussion on what the word "god" really means in this setting.
Otherwise, I think it may depend on where they fall in the divine hierarchy. Is the MC the Top God? Or maybe they are one of several Odd Job Gods. Maybe they need to maintain the health and satisfaction of their worshipers because Gods Need Prayer Badly. "Dealing with their own share of problems" implies that Being God Is Hard.
Edited by KD
Most likely to be God Was My Copilot - the audience and main cast are shocked to learn one of them has secretly been a deity all along.
The MC of these stories are God. And act as Gods should do, being worshipped. Delivering upon prayers while dealing with their own share of problems.
I cannot seem to find this trope anywhere