While those exist, those wouldn't have been affected by this breach (or if they were it was only incidentally) - those communities are not using Discord's age verification but are doing it through DMs (or a 3rd party service). Discord communities do not have access to age or ID verification tools, nor do they have the ability to impose restrictions based off age or ID verification (yet, there is rumored to be an age-verification access restriction beta going out, but it apparently doesnt use ID)