The performance gains achieved by DLSS vary from game to game. According to NVIDIA, enabling DLSS boosts 4K gaming performance by up to 85 percent in Call of Duty: Black Ops Cold War. War Thunder sees gains of up to 30 percent, Enlisted gets an up to 55 percent performance enhancement, and in Ready or Not there are gains of up to 120 percent.
More games with DLSS are coming, including Cyberpunk 2077, if that game ever gets released.