Dress advice

I need some help on what to wear to my daughters christening.

I have a belly now, which I never had before, so things that used to look good on me don’t at all, and I don’t even know where to start

I have been looking up wrap dresses, but so many seem really short, and I don’t know, is that ok for a christening? Probably not. But then is a maxi dress ok, or too casual?

It seems like the wrap dresses are all either sun dresses, or too formal

So ladies..... what kind of dress would you wear to a christening? Is above the knee too short? Is a maxi dress too casual?

Any good styles that hide a belly?