During the public preview, JBoss EAP 7.2 is offered on Red Hat Enterprise Linux 7 using OpenJDK 8. A version of JBoss EAP on Java 11 will be available later during the public preview. JBoss EAP on Azure App Service is at current prices. As a preview release, there is no commercial support offering and use of the preview is limited to development and testing of your applications.
Reference article: https://azure.microsoft.com/en-ca/updates/public-preview-jboss-eap-on-azure-app-service/