AWS::CloudFormation::Interface

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups: # グループ分け
      - ParameterGroup
    ParameterLabels: # ラベル追加
      ParameterLabel

こうなる(細かい書き方はGitHubのCopilotにでもやらせてもらって)

Metadata: 
  AWS::CloudFormation::Interface: 
    ParameterGroups: 
      - 
        Label: 
          default: "Network Configuration"
        Parameters: 
          - VPCID
          - SubnetId
          - SecurityGroupID
      - 
        Label: 
          default: "Amazon EC2 Configuration"
        Parameters: 
          - InstanceType
          - KeyName
    ParameterLabels: 
      VPCID: 
        default: "Which VPC should this be deployed to?"

docs.aws.amazon.com