The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path

I am making a dynamic web app in Eclipse 2020-12 (4.18.0) without Maven. I am using Apache Tomcat 10.0.4 I am seeing the below errors in my jsp page:

The superclass "javax.servlet.http.HttpServlet" was not found on the Java 
 Build Path

Below is my project Java build path and Target runtime setting

I've tried following answers but none solved my issue The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path and https://stackoverflow.com/a/4076706/8187139