Would it be possible to target private taxonomies (using Taxonomy Term) in the location group rules, similar to the recent change for the taxonomy field?
I have recently created a set of custom location rules for targeting public taxonomies. Not sure if this would work in this case, but if it doesn’t it could be used as an example here. I know this is an old question but someone else may find it useful. https://github.com/Hube2/acf-filters-and-functions/blob/master/public-taxonomy-location-rule.php