What the heck - first @Hyundai / @Kia using only 350A adapters for NACS to CCS and now the CCS to NACS adapter included with native NACS Ioniq 5 is using "NACS legacy" / 500V Tesla NACS aka not 1000V J3400 (NACS). Who is doing this at HMG?? 
(Pics from The Ioniq Guy and NACS / J3400 comparison)
OP: