wp_get_first_block()

wp_get_first_block( array $blocks, string $block_name ): array

function wp_get_first_block( $blocks, $block_name ) {
	foreach ( $blocks as $block ) {
		if ( $block_name === $block['blockName'] ) {
			return $block;
		}
		if ( ! empty( $block['innerBlocks'] ) ) {
			$found_block = wp_get_first_block( $block['innerBlocks'], $block_name );

			if ( ! empty( $found_block ) ) {
				return $found_block;
			}
		}
	}

	return array();
}