Does adding an email attachment feature affect app approval?

Hi, I’m in the stage of developing an app but there’s a feature that requires a developer to assist them on (or they can do it themselves) to attach files to emails they’re already sending (flows like order confirmations, shipments, whatever, …)

Will this feature hinder my app approval since it can’t be seamless (just for this feature though) and it’s not necessary for the app to work (it can function, it just won’t send the particular information we make available in these emails)

Thanks for your time, I appreciate it as I’ve spent plenty trying to get this answer questioned.