With Samsung's Galaxy Z Fold2 5G out already, Huawei is bound to release its own 2020 foldable flagship in the following months. And a reliable insider claims that display's size will be the same as on the previous Mate X, measuring 8.03" in diagonal when unfolded.
The Mate X2 will have the same panel size as the original Mate X, 8.03”. But it is in-folding rather than out-folding.
— Ross Young (@DSCCRoss) August 9, 2020
Two days ago, a report from the same source said that the design of the foldable display will now be inwards folding and that the panels will be sourced from Samsung and BOE. Moreover, it won't be using Samsung's UTG (Ultra Thin Glass) technology and will rely on the CPI (Colorless Polyimide).