On my previous 2016 sorento there was a full size shield underneath, so doing a diy oil change was out of the question
I've been doing oil changes on the 2016 for years, and I gotta ask: why was it out of the question? It's a handful of 10mm hex-head bolts. With a drill or small impact wrench, the undercover takes about 1 minute to remove. If you're DIY-ing, these tools are essential if you want the work to be efficient, easy, and not damaging to your vehicle. Cutting a hole in your car to save 2 minutes doesn't seem worth it to me.
And also, part of general maintenance is inspecting things visually, especially underneath the car. You should keep that in mind when doing any job. Even if it's just an oil change, you might as well take a long look at things while you're under there anyway. It's hard to see much with the cover still on there all the time.
AND, when you finally do have to remove it (for a transmission fluid change or radiator flush), keep in mind that these bolts are very cheap, and they rust like crazy. Going years without removing it, could make for a very frustrating job.