If your parents have a degree, even in a different country, than it does actually apply.
My kid’s dad earned his undergrad in a different country and she entered it on all her apps (Common App even had the school listed). If a college thinks neither of your parents have a degree (i.e. ‘does not apply’) then you are considered 1st gen, and this does make a difference in admissions.
Will it make a difference in this case? Probably not, but I agree with other posters that you should definitely be forthcoming.