I am deploying an AWS stack using CloudFormation. It creates an AWS EC2 instance that runs a Java application. The Java application starts and tries to access the public IP of the AWS EC2 instance. Below is my code:

String EC2_PUBLIC_IP_URL = "http://169.254.169.254/latest/meta-data/public-ipv4";

findCurrentPublicIp(DeploymentType deployment) throws IOException {
    URL publicIpUrl = new URL(EC2_PUBLIC_IP_URL);
    try (BufferedReader reader = new BufferedReader(new InputStreamReader(publicIpUrl.openStream()))) {
        return reader.readLine(); // The only result of the request will be the public IP on one line
    }
}

My implementation works fine when the region is set to eu-central, but it fails for ap-south with the following exception:

Server returned HTTP response code: 401 for URL: http://169.254.169.254/latest/meta-data/public-ipv4
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) ~[?:?]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) ~[?:?]
    at java.base/java.net.URL.openStream(Unknown Source) ~[?:?]

I am using IMDSv2 (imds-2.20.11.jar). Does the API to fetch AWS EC2 instance public IP change depending on region?