themes-wordpress/seedlet-blocks/sass/blocks/_links.scss

/**
 * Links in navigation
 */
.wp-block-navigation-link {
	a {
		:hover{
			text-decoration: underline;
			text-underline-offset: 0.4rem;
		}
	}
} 

/**
 * Links in Content
 */
.is-root-container, // Editor class hack.
.wp-block-post-content {
	a:not(.wp-block-button__link):not([download]) {
		color: var(--wp--custom--color--primary);
		text-decoration-color: var(--wp--style--color--link);
		text-decoration-thickness: 1px;
		text-underline-offset: 0.2em;

		&:focus,
		&:hover {
			color: var(--wp--style--color--link);
		}
	}
}