Then maxillary forward movement will allow your jaw to project more to maintain occlusion.
However!
Mandible size and chin projection is genetic. Don't think that maxillary expansion will make this feature more robust. It will project more but don't think you will look like an MMA fighter magically
Regardless, a weak chin with a forward maxilla looks way better than one with a downswung /recessed maxilla.
If your chin is weak and your incisors are proclined as well as your palate is wide, your mandible essentially protracts to an ideal position
Skull and Jaw Correction
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