My story includes a government plan to create woman who are as strong as an average man. The biggest factor in the sex-strength difference is muscle mass as far as I know. However, the ratio of fast-twitch to slow-twitch fibers in muscle also plays a factor. It's why cats are pound for pound stronger than dogs. If genetic engineering was used to make woman with a higher fast-twitch fiber ratio than men, would that enhance their strength while minimally changing their appearance? Would there be unforeseen biological consequences that are specific to woman? For example, the metabolic processes of men and women differ and I think the ratio of muscle fiber types play a role in that, but I don't know how changing that ratio would affect metabolism.
The woman are genetically changed before being born and the egg is fertilized. Also woman have higher endurance than men according to this paper. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2909485/