Limited evidence that COVID -19 infection during pregnancy could lead to a greater risk of childhood obesity. Much more evaluation required to determine is there is a plausible mechanism involved in the process and if this is true.

Medical Mythbusting Commentary for March 30, 2023

Source:
Contracting COVID-19 while pregnant could lead to a higher risk of obesity for the child: study

Reference:
Press release: COVID-19 during pregnancy may increase obesity risk in children