Hello,
It is best to leave in colour - that is according to Adobe Stock - the buyer can easliy convert to B&W but not the other way round!
From a B&W perspective, your image is underexposed, it lacks contrast, so the result is'muddy'. There are no whites or blacks, just a muddy grey.
Looking at the histogram of your image it shows this:

This means it is underexposed.
So, an alternative method instead of levels is to increase exposure in the exposure slider, increase contrast, and decrease the highlights a bit - something like this:

Of course, this is much easier done if you took this in raw, rather than the camera saving to JPEG.
If you don't know about raw, then I would read a lot about it.
So, yes, there are a number of issues with this image.
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