When creating a new AWS site, the region must be selected and subsequently the AWS AZ name when adding the Ingress Gateway.
It would be cool if the AWS AZ name drop-down list was filtered based on the region name the site- 'cause they have to match anyway!
Can you also please alphabetise the Region List? For example, eu-west-1 is followed by eu-west-3, but eu-west-2 is further down the list.