How to get the metadata of saved object/file in aws s3 using amplify - flutter

Question

I am new to AWS amplify framework. I am saving images from my flutter app with custom metadata. In the same way, I would like to use those metadata to display in my app along with the saved image in the detailed view.

But the issue is, that I can retrieve the key alone from the StorageItem class. How could I get the metadata of the saved object from the s3 bucket using flutter?

Thanks.