I am linking to this mainly because it is not a journal article. This is a news website posting something for non-eye doctors. Thankfully, they got two people who are at the forefront of myopia research, Debbie Jones and Kate Gifford, to write the article.
Simply spending more time outside can delay the onset of myopia. Direct sunlight plays a part, as well as the long-range focusing while playing outdoors. Restricting screen time is an option with optometrist-endorsed recommendations relating to screen times for children.
If you aren’t at least talking about kids spending more time outside, you aren’t properly taking care of your pediatric patients. There is a lot of data out there supporting it.