Rising obesity in kids is observed but no link is made.
All the while I have seen my country 'Americanizing' in the last 20 years : more McDs etc, now the food delivery guys and McDs now delivers to your home too ( unfanthomable! )
It is not the US style what sells it : it is convenience. Convenience sells.
At least in the US. Maybe it's different in Europe.
$4+ per diner delivery markup (increased base food price, delivery fee, tip) will keep it from being a widespread problem. This is like worrying that meal ingredient delivery services will make lots of people more sedentary because they won't walk to the grocery store—no, it won't, because not many people can afford those services.
After all, the USA was once a country of broad, healthy outdoorsy types, and that health pattern carried on well into metropolitan living, well into the late seventies.
And then the "TV dinner" approach was all dinners, and along came higher and higher calorie snacks. Americans became substantially less healthy in less than two decades. Through convenience shopping.
The same thing happened to the British at only a slightly smaller scale, and slightly later.