Display acf taxonomy attachment

hi, so using wordpress I wish to add a taxonomy tag to each individual images e.g (img src="/xyz" my-data=“taxonomy-here”). I’ve added the attachment by using advanced custom fields. I cannot seem to display the taxonomy tag in the html. At the moment it is just displaying the first random tag

Id appreciate any help. Thank you.

function new_content($content) {
$categories = get_categories($args);
foreach($categories as $category) 

$term = get_queried_object();
$test = get_field('tag_cat_acf', get_post_thumbnail_id());


$content = str_replace('<img ', '<img data-attr="'.  $test->name .'" ', $content);
return $content; 
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