Can we set delete = 1 when we uninstall the plugin or the package before uninstalling or after uninstalling not manually dynamically?

Yes, you can set delete = 1 when you uninstall a plugin or package dynamically. Here is a solution:

function uninstall_plugin($plugin_name) {
  // Get the plugin data.
  $plugin_data = get_plugin_data($plugin_name);

  // Set the delete flag to 1.
  $plugin_data['delete'] = 1;

  // Update the plugin data.
  update_plugin_data($plugin_name, $plugin_data);
}

// Uninstall the plugin.
uninstall_plugin('my-plugin');

Thank you Yebar Feed.

Hi Kishan, Glad it helped : )