You can detect Tomcat Default Page using this tool.
The Apache Tomcat® software is an open source implementation of the Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language, Jakarta WebSocket, Jakarta Annotations and Jakarta Authentication specifications. These specifications are part of the Jakarta EE platform. The Jakarta EE platform is the evolution of the Java EE platform. Tomcat 10 and later implement specifications developed as part of Jakarta EE. Tomcat 9 and earlier implement specifications developed as part of Java EE.
The remote web server uses the default Apache Tomcat index page. This page may contain some sensitive data like the server root and installation paths. This could potentially leak useful information about the server installation to a remote, unauthenticated attacker.
Remove the default index page.