As southern Italian, if you have plenty of southern Italian guests, yes. Food is really centric in the celebrations and expectations are high..and I can guarantee, people will remember and talk about it for years and years...all based on food *

Nevertheless, the wedding is yours and it's your decision...you do not have to accommodate all the guests,it's almost impossible, but at least it's important to serve alternatives based on the different diets (vegan, celiac, kosher, halal, etc)

In any case, something that we use to do nowadays is a huge starting buffet with different specialities... from diary products to cold cuts, raw fish, pastas etc... (People usually got stuffed there). Then, only one first dish (pasta) One main (meat/fish) Pre dessert

Then

Dessert buffet

Cake

This formula is working a lot, people are always happy, and it's not like in the past where tons of food was wasted.

Anyhow, that's valid for typical southern Italian. the rest of italy usually they eat way less. If you are afraid of it, you can always be heavier on the apero. But please, quality is the main pillar, and in case of buffet, it should be supervised, with waiters serving.