The reason I make mention of the above is that in your image/photo here.. the foreground is nice and sharp. And then moving to the background.. some clarity and sharpness is lost.
So.. was curious about whether or not Auto Focus lock was even an option. And good good news.. it is.
For future reference, perhaps.. and next time.
Back to your image.
Bit of preamble first.. kind of, sort of.. as I did take a look at your personal gallery to date..
"its nice to see a new member with fresh ideas, thats quite a unique shot you have here. lovely composition with a great angle."
... and equally applicable as a comment here.
In short.. nice one. You really challenged you and your phone/camera with the varying lighting conditions within frame.. and came out.. on the good good side of things.