WP_Block_Styles_Registry::get_registered_styles_for_block( string $block_name )

Source

File: wp-includes/class-wp-block-styles-registry.php

public function get_registered_styles_for_block( $block_name ) {
		if ( isset( $this->registered_block_styles[ $block_name ] ) ) {
			return $this->registered_block_styles[ $block_name ];
		}
		return array();
	}