You may encounter errors related to fixup operations failing during the migration of an EC2 instance to VMC using HCX OSAM.
HCX OSAM currently only supports KVM or Hyper-V for conversion to VMware VMs. When attempting to migrate an EC2 instance to VMC, it will fail at the fixup phase as it is unsupported.
The VMware Converter supports EC2 as a source and can be used as a workaround to migrate EC2 instances to VMC.
Although the AWS EC2 instances may be running a supported Guest OS for HCX OSAM, you will not be able to successfully migrate the EC2 to VMC utilizing HCX OSAM.
see knowledge base: 313632