ENA Express now supports 58 new instance types ranging from 16 to 192 vCPUs. With this launch, ENA Express is adding support for 20 new memory optimized instances, 15 new compute optimized instances, 15 new general purpose instances, and 8 new storage instances. Before today, ENA Express supported only the largest instance size, totaling 27 instances as small as 64 vCPUs.
Source:: Amazon AWS