Create Customer_gateway in specific aws region using terraform

I am in the process of terraforming our Site_to_Site VPN connections in multiple regions and I cannot find any documentation on how to specify a region while creating the CGW. The below will create it in my default us-east-1 but I want to create this in us-west-1 and a host of others, but one thing at a time.

resource "aws_customer_gateway" "cgw-singapore" {
    bgp_asn     = 65000
    ip_address  = ""
    type        = "ipsec.1"

    tags = {
        Name =  "cgw-singapore"