In the book, this verse is used as evidence that the Qur’an is uncreated. I cannot exactly figure out how this verse points out to that. "Indeed the creation and the command belong to Him," (Al-A'raaf, 54). Some insight would be appreciated.

The answer to your question lies in the explanation of the verse in the book. It says:

Here a distinction is made between His creation and His command and the Qur’an is from His command as is evident in the following verses:

“That is Allah’s command which He revealed to you.” [1]

“In that way We revealed to you a spirit (Qur’an) from Our command.” [2]

So, the verse you asked about (Al-A'raaf, 54) mentions two things: Allah’s creation and Allah’s command. If they were the same thing, then Allah would not have mentioned them separately. Hence, we can conclude that Allah’s creation is not the same as His command, they are two different things; and that the Qur’an is part of His command, not His creation.

References:

[1] (Surah at-Talaq, 65: 5)

[2] (Surah ash-Shura, 42: 52)