2K is not really a high round count for the gun. It is for many shooters with many guns who never shoot a thousand rounds through any gun they own.
If the gun looks properly cared for, then look for recoil spring wear through repeated cycling. I’ve had guns need springs in less than 1K,; others go 3K. You can tell when they need replacement by hand cycling a new gun in the store then yours. If your slide can easily slam all the way to the rear and the effort needed is much less than on the new gun, get a factory replacement recoil spring assembly (RSA), or upgrade to one of the aftermarket drop in stainless steel RSA’s.
You cannot harm your gun by replacing an RSA too early. You can somewhat accelerate wear by waiting too long, and shooting may be a little less comfortable.
Word of caution: your gun is going to be stiffer to cycle for a couple of hundred rounds.
ETA: You could send S&W Customer Service an email and probably get the best answer to this question.