HomeRunner supports Hostfully multi-unit listings. Properties you configure as multi-units (apart-hotels) in Hostfully sync to your site and are grouped as a single bookable property, not as a list of separate standalone rentals.
New locations not grouped yet. If you recently added a new apart-hotel location in Hostfully and it does not yet appear correctly grouped on your site, a sync refresh pulls in the updated structure. Contact support and they can trigger the refresh for you.