By default, a self-developed WordPress plugin only has an activate/deactivate link in the plugins overview.

If additional links are planned for the plugin overview, such as a link to further settings, this must be done via a filter.
add_filter('plugin_action_links_' . plugin_basename(__FILE__),
function ($links) {
$links[] = '<a href="replace-me">Settings</a>';
return $links;
});
In the filter, you can specify both the name of the link and the corresponding target. You can also add as many links as you want here – there is no limit.