This is hard as it’s a habit and I totally understand as a parent. They may grow out of it as they grow and want to be part of the conversation. Ways to approach this are: phase the usage meaning allow 3/4 of the meal with it, then 1/2 then 1/3 then remove it... it’s breaking the habit. Don’t let it be visible at the table or where you eat so perhaps they won’t be reminded. Eat with them and engage them in conversation or perhaps a game ( one where you talk through something not with pièces etc) like a guessing game or something where they can be involved and engaged and still have breaks to eat. You can also use a reward system depending on your family and how you feel about it. For example if no iPad at dinner with no complaints then 20 min more after school.