The "VMware NSX Migration for VMware Cloud Director 1.1" is available in it's second release already. The bits can be downloaded from the VCD 10.2 product download page.
Good point, thought you asked about NSX Migration for VCD 10.2 😀. My mistake. That version I don't know about.
Yes, I've asked about NSX Migration for VCD 10.2, because "VMware NSX Migration for VMware Cloud Director 1.1" doesn't support Cloud Director 10.2
Here is a good video regarding this tool: https://youtu.be/OEOVkeg6L1c?t=601