6 files declare their use of UIkitComponents in UIkit Components 8.3

AdminForm.php in src/Form/AdminForm.php

alter.inc in includes/alter.inc

Modify structured content arrays.

MenuEditForm.php in src/Form/MenuEditForm.php

preprocess.inc in includes/preprocess.inc

Set up variables to be placed within the template (.html.twig) files.

theme.inc in includes/theme.inc

The UIkit Components theme system.

uikit_components.module in ./uikit_components.module

UIkit Components.