Hi there
You can download CIM provider from Dell's offcial website and then can install same on your esxi
Below is command to intall provider
esxcli software vib install -v /path/to/vib
And then restart wbem service
esxcli system wbem set -e false
esxcli system wbem set -e true
And you will be able to see storage info
You can list all the cim prooviders installed on your host by running below command
esxcli system wbem provider list