That's debatable, which is never going to be resolved. So it is pretty pointless talking abouit it i find. But even if it does say that the Earth is spherical, that is by no means remarkable.
With all due respect, no it's not debatable.
The Quran really doesn't mention that the earth is spherical. Anywhere.
If anyone thinks otherwise then the onus is on them to show us where it supposedly says this.
The verses which the likes of Zakir Naik use to support his claim are embarrassing to say the least. I don't know how he manages to keep a straight face when he spouts them.
According to him, the verse in the Quran which tells us that the
"day merges into night and the night merges into day" is also miraculously telling us that the earth is spherical.
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By saying that this issue is "debatable", it's almost as if you're giving these ridiculous Islamic pseudo scientists
some credit for their findings.