It's lame but it's true that during the Verily release of mosquitoes from their carts [1] in HDB estates, they had a lot of people complain how since releasing they saw more mosquitoes and were bitten more often, while the mosquito traps showed a clear decline in population.
For small scale production it's a manual process (size differences), for industrial scale it's using ML and blowing air in a certain direction. Basically the mosquitoes are brought under a camera in some form of tube, and depending on the gender they are blown into a certain direction separating male and female.
I don't think this is part of Verily, and afaik Verily was one of the first that starting doing this.
[1] https://www.channelnewsasia.com/news/singapore/nea-alphabet-...