https://www.techradar.com/news/google-pixel-3-and-pixel-3-xl-have-been-certified-in-taiwan

With all the leaks that are emerging we have little doubt that we’ll get an official look at the Google Pixel 3 and Google Pixel 3 XL before long, and now there’s more evidence that they’re coming soon, as they’ve both been certified in Taiwan.

Specifically, they’ve been certified by the NCC (National Communications Commission), in a listing that was spotted by MySmartPrice, and there’s no question as to what devices they are as the two phones were referred to by name, though they also came with the model numbers G013A and G013C for the Google Pixel 3 and Google Pixel 3 XL respectively.