Nice house plan. Love the abundance of natural light (especially in the primary closet, bathroom areas) and ceiling heights. I would suggest a powder room, add a mudroom and shoe/coat closet near the south garage closest to the kitchen as I'd image that is the vehicle garage, carrying groceries and coming in with kids or pets.
Also, regarding the bedroom #4 bathroom that leads to the lanai, I would suggest not using a door with any glass, opaque glass or not. Its a bathroom. Especially at night when the light is on inside the bathroom, you will see everything the person is doing from outside the lanai due to shadowing, unless those things don't concern you. I would suggest a transom window above the toilet, sink area since your plan seems to have tall ceilings anyway, for natural light.
Regarding the garage situation, I would suggest based on your vehicles sizes, easy of pulling in or backing up that you delete the north garage all together. Backing a full size SUV or Raptor will be awful always trying to clear or not hit the other garage. From a functional stand point and aesthetic.
And to maintain the garage size, add it to the south garage and merely make it 3-4 car garage. For vehicles of your size, a double door at least 18ft wide. 20ft is ideal. On a single stall door, 10ft minimum. 12ft ideal. In terms of actual garage size, I would make it 30' deep minimum x 50'wide. If you like single doors, three 12ft wide garage doors, 2ft in between each door with 5ft on each end cap (room for garbage cans, cabinets, bikes, etc, and while still being able to full swing your vehicles doors). Use the third stall as a gym and yard tool storage. Don't forget to add a utility sink for hot/cold water in the garage. We use ours all the time.
I would make the argument that it would also be much less expensive to make one larger garage on one side vs two small ones.