I don't have any stats to back this up, but the impression I got from the states is that the weight gain is distributed unequally.
Some people seemed very very fat.
Edit found something that would support that idea.
Proportion of people who are obese over the globe: https://ourworldindata.org/grapher/share-of-men-defined-as-o... https://ourworldindata.org/grapher/share-of-females-defined-...