GitLab runners status is showing "New Runner, Has Not connected yet" in GitLab Cloud

GitLab Runners are failing to communicate with GitLab Cloud.
While trying to add new runner, IP of the runner is showing different in GitLab Cloud.
if we add new runners, both of them will have a different IP even though both runners are in a same machine.
If it is because of IP whitelisting, can anyone suggest me, where can we find that option in GitLab Cloud