Absolutely stunning Phil, I have the same iPhone and cannot take anywhere near as good photos as you can!
Discussion
Of course you can! The hard part I find is trying to find something interesting to take a photo of as as I’m not really very artistic.. Then I usually just make some minor adjustments - fix the levelling of the horizon if it isn’t level, often bring down the highlights a little and increase shadows, increase contrast etc until I like the look of it.