Of course, each additional orbital plane is basically another set of roads but for all the internet sat constellations being planned extra distance = lag, hence we’re going to see the most growth in that LEO category
LEO = <2000km altitude, and
rEarth = ~6300m, so
surface area of a sphere with r=6300km => ~500,000,000 km^2
surface area of a sphere with r=8300km => ~860,000,000 km^2
so roughly 1.5x the surface area at max LEO compared to earth's surface
(feel free to correct me if my arithmetic is off :)
Two cars sitting still in a car park won't collide with each other, but there's no way to sit still in orbit.
Any two circular orbits at the same altitude will intersect at two points. You have to be very careful to make sure objects in such orbits will not collide with each other. It's far easier to make the orbits slightly different sizes or shapes, so that they don't intersect at all.
In any case, the need to be in an orbit to stay in orbit severely restricts your free choices for where to put your objects, so there is not as much free space as you might expect.