How can you change your age on i am only 12 (turning 13 in a few months) but it says 21 on here. i think i clicked on something wrong. is there a way to change it, or am i stuck being 21 on here?

The camera still is bad even with the new iphone xr and especially in low light it is even worst because you can see the pixels more if its in low light. if all you apple customers want apple to fix this then lets fill there feedback with complaints about the