Django Admin Filter if exist then exclude those items

I need to filter out with this query so that I do not have to see every item all over the World, if I could query with country-specific and will see only country-specific , I need help on this

admin.py

def formfield_for_manytomany(self, db_field, request, **kwargs):
   if db_field.name == "item_name":
      kwargs["queryset"] = models.ItemList.objects.fliter(countries__in=[request._user_country]).exclude(countries__in=[request._user_country])
   return super().formfield_for_foreignkey(db_field, request, **kwargs)

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