I had it done probably 30 years ago, called uvulopalatoplasty The uvula and surrounding soft tissue is trimmed so it doesn't flap like a flag in a strong breeze. Did it decrease my snoring? Maybe a bit but not enough to warrant the recovery agony. I was on liquid, viscuous lidocaine for a week or more. Imagine wolfing down an ounce of tasteless 50W motor oil every three hours. After you can tolerate solid food, jello and crushed bananas for several more days. Great for losing weight.
My advice, get a CPAP.