Most SKUs of the Huawei P30 Pro flagship have 8GB of RAM. However, it appears that the OEM is about to release a further variant of this phone with an additional 4GB. Then again, this new, ultra-high-end device may be a Chinese-market exclusive.
https://www.notebookcheck.net/Huawei-gets-12GB-P30-Pro-variant-certified-in-China.424128.0.html