First, I’d try not pixel peeping at 200%. Even the best sensors at base ISO are going to have some noise at that level unless you apply some noise reduction.
If possible, can you post an example RAW file? The lowpass module with color blending is extremely good at removing color noise in my experience, but I only use it for really noisy photos. For low ISO images, the default profiled denoise is also good enough as a one-click solution if your camera is one of those supported.