Problem with AWS Cloud Provider

Hi all,
we are running a K8S Cluster on a IAAS Infrastructure on AWS, and we have already imported on our PRD Rancher Console release 2.5.5 as other Cluster

we read and implement the following documentation :

questions are:
how can we check if all was implemented correctly?
Do you think we are forgetting other steps?

do you have any suggestions?
thank you in advance

Alessandro Carrettoni