You can adjust the following title styles. Remove any line to revert it back it’s default value.
/**
* Collection Carousel
* Title Styles
* From Will-Myers.com
**/
[data-wm-plugin="collection-carousel"] {
--wm-cc-title-font-size: 1.4rem;
--wm-cc-title-font-family: 'Helvetica';
--wm-cc-title-color: #000;
--wm-cc-title-text-align: center;
}