Huawei for one, despite their impending ban by Google, says it is still committed to updating their current list of flagship devices to the new operating system when it drops. The official list from Huawei includes these devices;
Huawei P30/P30 Pro Huawei P30 LiteHuawei Mate 20/Mate 20 Pro/Mate 20 X 5G,Huawei P Smart/P Smart Plus (2019)Huawei P Smart ZHuawei P20/ P20 Pro.
It is important for Huawei users to note that the ban by the US Government does not affect them right now. The ones that will surely be hit, and rather severely are the unreleased devices.