Part of the veto of Huawei by the United States comes in the form of the total disengagement in this regard from American technology. Given that the screens manufactured by both LG and Samsung involve the inclusion of a chip inside that has been designed in North America (by TSMC surely), they are prohibited from supplying screens to Huawei. This measure goes into effect on September 15, at the same time that TSMC will also stop manufacturing chips for Huawei, leaving Huawei completely thrown into the manufacture of its Kirin SoCs and, now, also in its screens.
According to LG, the volume of screen sales to Huawei is not high, so it will not have a great impact, but Samsung (who manufactures most OLED screens in smartphones) has not said anything, surely because for them, it does mean a major change. Be that as it may, from Reuters they have confirmed this information, which is surely true because things between the US and Huawei are only getting worse. In fact, the total disengagement of the country with the Chinese manufacturer will cost the former more than 1800 million dollars just for the operators.