Setting name	Description
Allow Block Types	Filter which block types can be chosen
Appearance	Select the appearance of this field
Default Value	Enter each default value on a new line
Return Value	Return the block type name or block type object
Allow Null	Allow empty value
Layout	Choose the layout
Toggle	Allow to toggle all values
Allow Custom	Allow custom value
Save Custom	Save custom value in the field settings
Select multiple values	Allow multiple values selection
Stylised UI	Enable Select2 UI style

#Field Value

#Return Format: Name

$block_types = get_field('block_types');

// my-block-type

#Return Format: Object

$block_types = get_field('block_types');

/**
 * array(
 *     'name'        => 'acf/my-block-type',
 *     'title'       => 'My Block Type',
 *     'description' => '',
 *     'category'    => 'layout',
 *     'icon'        => '',
 *     'mode'        => 'preview',
 *     ...
 * )
 */

#Unformatted Value

$block_types = get_field('block_types', false, false);

// my-block-type