Of empty space, maybe, and even then what they actually say is that it's expanding at the speed of light, so it's only functionally infinite.

Infinite Earth still doesn't explain how we observe the sun moving, or how we see the stars moving, or tides, or anything else that would be required if FE was true.

Of empty space, maybe, and even then what they actually say is that it's expanding at the speed of light, so it's only functionally infinite.