From @lauriii in #216 in #3111409: Add new Olivero frontend theme to Drupal 9.1 core as beta
+++ b/core/themes/olivero/templates/includes/preload.twig
@@ -0,0 +1,7 @@
+{#
+ Preload the fonts for the headings and normal body copy (non bold and non italic).
+ #}
This should be converted to @file documentation and should include variables passed for the template.