Hi community,
I am currently new to ROS and I have been following some tutorials to get my hands on ROS. My current workspace involves implementing slam over gazebo. Following the tutorial from here Automaticaddison.com: Turtlebot simulation with ROS, I have implemented the following code for installing slam-gmapping
$ sudo apt-get install ros-noetic-slam-gmapping
Since, I have ROS-noetic distro installed

Further, I have also build my workspace using $ catkin_make and the sourced it using $ source devel/setup.bash
After this, when I search for files inside slamgmapping folder: Path `/opt/ros/noetic/share/slamgmapping<br> $ roscd slam_gmapping`
only package.xml is present having the content as

<package>
  <name>slam_gmapping</name>
  <version>1.4.2</version>
  <description>slam_gmapping contains a wrapper around gmapping which provides SLAM capabilities.</description>
  <author>Brian Gerkey</author>
  <maintainer email="ros-orphaned-packages@googlegroups.com">ROS Orphaned Package Maintainers</maintainer>
  <license>BSD</license>
  <license>Apache 2.0</license>

  <url>http://ros.org/wiki/slam_gmapping</url>

  <buildtool_depend>catkin</buildtool_depend>

  <run_depend>openslam_gmapping</run_depend>
  <run_depend>gmapping</run_depend>

  <export>
    <metapackage/>
  </export>
</package>

due to which I feel I am unable to execute the command
$ roslaunch turtlebot3_slam turtlebot3_slam.launch slam_methods:=gmapping
displaying the following error

RLException: [turtlebot3_slam.launch] is neither a launch file in package [turtlebot3_slam] nor is [turtlebot3_slam] a launch file name
The traceback for the exception was written to the log file

I am not sure how do I fix this, please help me out here