Hi,
First of all, can I Ask you if you strictly followed pre requisites regarding ports by having a look here: https://ports.vmware.com/home/VMware-HCX
You have also the ability to chat with Support and eventually open a ticket through the chat window from the Cloud Console by clicking on "?"
Is this a POC or a project with a customer?
Are you already in contact with a VMware Cloud on AWS team member in your country?
Thank you
Emmanuel