Would it be wrong to only invite the kids who are in your wedding party only?

I am getting married next year may and we are not having kids at the wedding except the kids who are a part of mine and my fiancés wedding ceremony my 2 flower girls who are both turning 10 next year and 1 ring barrier who is 11 and my fiancés sisters newborn baby who going to be born a month before our wedding so I can’t make her leave the baby yet .

I know I’m going to be getting backlash for this but I think the kids who should be invited to my wedding are the ones only in the wedding party and of course If it’s a newborn whose not even 1 month old yet.

Lastly another reason we are not having children is due to venues capacity which is 220. The only thing that is going to be the con of all this is my close cousins who have 1 or 2 year old child will not be at my wedding so most likely they won’t be coming either which I can’t blame them for that .

Is there anyone here been in a similar situation like me ? I would like to hear your stories and opinions also.