So I made a work around solution that uses shortcodes that might help.
Basically use the ACF NextGen Gallery Field to find the gallery ID then pass that into a shortcode that has the Plus display styles you want and then echo out the the short code using the do_shortcode() function.
The parameter options for display type are:
display_type=”photocrati-nextgen_basic_slideshow”
display_type=”photocrati-nextgen_basic_thumbnails”
display_type=”photocrati-nextgen_basic_imagebrowser”
display_type=”photocrati-nextgen_basic_singlepic”
display_type=”photocrati-nextgen_basic_extended_album”
display_type=”photocrati-nextgen_basic_compact_album”
display_type=”photocrati-nextgen_pro_slideshow”
display_type=”photocrati-nextgen_pro_thumbnail_grid”
display_type=”photocrati-nextgen_pro_horizontal_filmstrip”
display_type=”photocrati-nextgen_pro_film”
display_type=”photocrati-nextgen_pro_blog_gallery”
display_type=”photocrati-nextgen_pro_list_album”
display_type=”photocrati-nextgen_pro_grid_album”
display_type=”photocrati-nextgen_pro_masonry”
Example:
<?php
foreach ( get_field ( 'gallery' ) as $nextgen_gallery_id ) :
$galleryID = $nextgen_gallery_id['ngg_id'];
$galleryShortcode = '[ngg_images gallery_ids="' . $galleryID . '" display_type="photocrati-nextgen_pro_masonry" override_thumbnail_settings="1"
size="390" images_per_page="20" spacing="10"]';
echo do_shortcode($galleryShortcode);
endforeach;
?>
note “gallery” will need to be the name you gave the field in ACF