The Huawei P10 has a great rear dual-lens camera which can capture stunning images, but when it comes to low-light photography, it's quite lacking and results in unnoteworthy low-light performance. I've seen camera samples taken at later afternoon and ones that shot in the evening in Barcelona. You can clearly see that the camera struggles in low-light. In the official Huawei P10 website it says "Superior low-light photography", but in my observation it's isn't the case.
I think the main cause of this relatively low performance is the F2.2 aperture lens. The Huawei P10 comes with an optical image stabilization so it's not too bad either. By the way, the OIS doesn't work in 1080p60 and 4K video recording resolutions. You can't compare the results to a camera with a f/1.7 aperture and 1.4-micro or high pixel size. The sensor and lens limitations are noticeable and the phones like Google Pixel and Samsung Galaxy S7 still tops the Huawei P10 camera when it comes to low-light performance. The Google Pixel performs amazingly well due to its large sensor pixels and the Galaxy S7 due to its high-end sensor and fast f/1.7 aperture lens.
It's not something that surprised me. Most of the best low-light snappers are reside in high-end smartphones. It is in these type of smartphones that you get the best sensors and a lens with a very fast aperture. If you want better low-light performance, you probably want to check out the more expensive Huawei P10 Plus which comes with the same 20MP + 12MP dual-camera setup and OIS, but with a faster F1.8 aperture lens which is 2/3-stops faster than the lens of the P10 (0.579 stops to be exact). In other words, the Huawei P10 Plus lens will let 1.5x times more light to pass through compared to the P10's lens. It doesn't sound a lot, but it does make a significant impact. When shooting in low-light, the light gathering capability of both the sensor and the lens are very crucial.
If the camera can't climb up higher and use a faster aperture, it will either use a slower shutter speed or increase the sensor's sensitivity, either way, you get a noisier image. The image can even turn out to be blurry if the camera opt to use a very slow shutter speed, one that is under the recommended one according to the shutter speed rule of thumb (1/focal length of the lens).
Here is an Huawei P10 4K low-light video sapmle shot by Btekt YouTube user. You can see that the low-light performance is average, nothing to right home about.
So overall, the Huawei P10 low-light performance is average mainly due to its smaller pixels and relatively slow aperture (relatively). By the way,