Rumors claimed the Huawei P30 phones would feature OLED displays made by Samsung. Information disproving that idea has surfaced, though, and it looks like the P30 Pro actually opts for LG-made panels, with some units sporting BOE-made ones, just like the Mate 20 Pro did.
https://www.notebookcheck.net/The-Huawei-P30-Pro-actually-features-AMOLED-displays-made-by-LG.418210.0.html