IQ is such a messy bunch of environment-vs-heredity factors for an arbitrary number that measures successful integration into western hegemony that it's not likely there'd be any reliable or consistent ways to increase it in a falsifiable way in an embryo besides "make sure parents have high IQs," and even then, kind of dubious.

Now, if techbros wanted to breed more ruthlessly efficient sociopaths I'm sure enough Torment Nexus tinkering could screen away frontal lobe and mirror neuron functionality.