[SPDK] AIO unmap support

Environment:
 * SPDK v20.10
 * OS Centos8.2 
 * SSD Intel DC S4600 https://ark.intel.com/content/www/us/en/ark/products/120522/intel-ssd-dc-s4600-series-480gb-2-5in-sata-6gb-s-3d1-tlc.html

My SSD support trim, but when I add it as AIO bdev I see that unmup not supported:
#scripts/rpc.py bdev_aio_create /dev/sdf AIO0 
# scripts/rpc.py bdev_get_bdevs
[
  {
    "name": "AIO0",
    "aliases": [],
    "product_name": "AIO disk",
    "block_size": 512,
    "num_blocks": 937703088,
    "uuid": "78b0d637-87ca-49ad-80ec-95c614a66685",
   ...
    },
    "claimed": false,
    "zoned": false,
    "supported_io_types": {
      "read": true,
      "write": true,
      "unmap": false,
      "write_zeroes": true,
      "flush": true,
      "reset": true,
      "nvme_admin": false,
      "nvme_io": false
    },
    "driver_specific": {
      "aio": {
        "filename": "/dev/sdf"
      }
    }
  }
]

Is there any opportunity to enable the unmap support for AIO bdev?
If not, is it possible to implement the unmap support for AIO in the near future?

Thank you.