Hi,
It would be best if you could attach original render, since in this zoomed out screenshot it's impossible to see any noise. As for the actual advice, first thing you could do, is to turn on UHD, or 4K cache - that could significantly increase render speed, so you could render more passes over the same time and get less noisy image. Otherwise i don't see anything obviously wrong in your scene, it's likely that you simply need to render it longer, or use more aggressive denoiser settings.