themes-wordpress/blockbase/sass/blocks/_buttons-outline-style.scss

@import "button-mixins";

.wp-block-file .wp-block-file__button {

	@include button-outline-hover-styles;
}

.wp-block-search {

	&.wp-block-search__button-inside .wp-block-search__inside-wrapper .wp-block-search__button,
	.wp-block-search__button {

		@include button-outline-hover-styles;
	}
}