They are plant or fungus based
The visible orifices on a human are the mouth for eating and tasting, the nose for breathing and smelling, the ears for hearing, the anus for pooping, and the sex specific orifices for urinating and reproduction. While mammals generally work this way, there are plenty of macro-organisms here on Earth that don't have any of these orifices in thier bodies, but they are pretty much all plants and fungi
When you eliminate the need to eat other organisms, suddenly the need for giant holes to consume food with becomes unnecessary. Plants and fungi don't have mouths. Plants consume most of thier energy through photosynthesis, and get most of thier chemical building blocks directly from the air and water The vast majority
of organic chemistry only uses hydrogen, oxygen, carbon, and nitrogen; so, even trace amounts of other stuff is all planets really need the soil for. Fungi, similarly use a sedentary method of absorbing nutrients. Even though they eat other organisms like animals do, they don't consume them. The excrete digestive fluids onto thier food and sit on it while they uptake just the nutrients. If you never take in what you don't need, you never have anything you need to poop out.
Breathing holes are also not exclusively necessary. Plants, fungi, and many amphibians breath through microscopic pores in thier "skins". So, it's highly feasible that a fantasy race could breath through thier skin too.
Hearing does not require holes. While mammals tend to have orifice based hearing organs, we are actually the exception to the rule. Reptiles, mammals, fish, and amphibians can all hear just fine without any orifices.
Like the mouth, your anus and urethra only exist because we eat other organisms whole, then have to sort out what we do and don't need and expel the unneeded stuff. If you ate more like a fungus or a plant, you'd have time to sort things out before you eat it, meaning you don't need a massive excrement system. What little waste you might need to worry about could be excreted like sweat.
Lastly, there is reproduction. Again, most plants and fungi don't pernitrate each other's orifices to reproduce. Some us a form of buddy where a part of the body just falls off and becomes a little clone of the parent. Other use purely external sexual reproduction methods involving pollination and fruiting.
So, as long as your barbie-folk get to spend long hours rooted in the soil, and basking in the sun, or spend thier nights sleeping in a big pile of food and self-excreted digestive fluids, then major orifices could be unnecessary.