Yes complety agree, i was searching for settings so many times for each plugins...

The settings link can be discovered (as of #1145 and #1146) by manually applying the plugin_action_links_{slug} filter, at least for webp-uploads and speculation-rules. For example:

$links = apply_filters( "plugin_action_links_{$plugin_main_file}", array() );
$settings_link = $links['settings'] ?? null;

Reminder: The plugin main file (e.g. speculation-rules/load.php) is not the same as the slug (e.g. speculation-rules).

Related: If we do go with Ajax-activation of plugins in #1139 then the settings link as provided by the standalong plugin may not be known before the plugin is activated. As such, another Ajax request may be needed to fetch the settings links unless we hard-code them in the Performance Lab plugin.

I would like to work on this.