Rear Mounted Bike Rack

I was just wondering if any owners of 2015+ Sorento's had rear-mounted bike racks? I've been researching them with a view to purchase, however when I enter our car into the suitability databases, all suppliers state that our car is incompatible with rear-mounted racks. It isn't just the Halfords website for example which states this, others have stated it too. Roof-mounted racks seem unsuitable for 3 bikes and I don't want to go down the expensive towbar route as we don't own a caravan so I can't justify the cost.

https://www.roofbox.co.uk/bike-carriers/bike-carriers-racks-info.php#roofmounting suggests three on the roof should be fine