Improper 4+ age rating for dating app requiring 18+

Hi,

I am working on an app intended to be a mobile version of a dating webstie. While compiling the age rating questionnaire, the app was rated improperly to what the actual content and intended use case is.

The app does not display mature/violent/**** content of any sorts (including picture sharing between users, which are verified and must be approved by the website service before they can be shared at all - no **** content of sorts is allowed), and does not make any references to drugs, alcohol, and other option listed in the questionnaire (all answers are "NONE"). Thus, it scores a 4+ rating.

However, the service provided through the app, and the use case, is clearly not intended for any young audience - and the service requires the audience to be 18 years of age, or older. Admittedly, you need to register an account with the website in order to use (log in) the app - which is where the age restriction actually comes in - but that's not a valid reason, in my opinion, to apply a 4+ rating.
I would like not to "force hands" and report that the app displays any mature content or other such options. But it seems there is no option to manually apply a different age rating.

How can I change the app rating such that it properly matches the intended use case?
Google, for example, allows to select a different (higher) age range if the app qualifies for one of the low age categories. Is there any way to do this with iOS apps?

If not, how should this age rating be interpreted at all?