I can only speak for the Southern US but, developers want to build front-loaded units in subdivisions because they are more profitable. A rear-loaded garage costs a shit ton more in materials and labor, not to mention getting into impervious surface maximums vs lot size etc. I work in permitting/zoning, it’s always money, always. Heads up, y’all, don’t buy a D.R. Horton house if you can possibly avoid it, the more you know✨️