The answer to your query is they are NOT far enough.
Consider, even if in “orbit”, it’s the same exact thing. Consider what an orbit is... you are actually falling to earth, at the same rate as the earth is moving behind you. Therefore, you stay aloft, because with a round earth, this continues without air resistance. An orbit is falling while moving horizontally with the earth moving behind.
If you are in a container with no windows, you’d not be able to discern any differences. With windows, you’d see the various scenarios that “caused” the weightlessness.
Thanks.
-PJ