You might want to learn the concept of delegation. Kid in the office can tell their sibling who can then tell other dad.
Additionally, cooking in group is a great moment to have a conversation, much more than the actual dinner where everybody is chewing.
> Kid in the office can tell their sibling who can then tell other dad.
The trope is mom tells the kid to tell dad dinner's ready, and kid just yells really loud to dad, while mom looks on with exasperation. Or was that just my childhood?
Cooking a family dinner together is a fun group activity, like a board game night. Which is great, say, one night a week. Feeding a family has to happen every night, where more can be done, faster, by a single person. And if you can't figure out how to eat and hold a conversation, you have failed at quite possibly the single oldest human activity.
And the delegation approach defeats the entire purpose of the fore-warning, which is to allow people to wrap up whatever they were doing, out of respect for their time.