wp-calypso/apps/o2-blocks/src/prev-next/editor.scss

.wp-block[data-type="a8c/prev-next"] {
	display: flex;
	flex-direction: row;/*rtl:row-reverse*/
	gap: 1em;
	justify-content: space-between;

	.prev-next__link-entry label {
		font-weight: bold;
	}
}

.wp-block-a8c-prev-next {
	display: flex;
	flex-direction: row;/*rtl:row-reverse*/
	gap: 2em;
}