Despite increasing doubt as to the fate of their processing solution, Huawei is currently thought to release the successors to the Mate 30 and 30 Pro before the end of 2020. These phones are believed to be an iterative update from these exising premium phablets, in looks at least.
They are indeed rumored to persist in recalling the Nokia Lumia 1020 in their rear-panel-dominating round camera housings. The Mate 40 and 40 Pro's latest renders have shown that this module may contain up to 4 sensors, arranged in a regular square.
A more recent Weibo leaker's post may give this idea more weight, as it offers what may be real-life views of the same. They are shown as standalone units of the same new rear cameras, complete with black glass surrounds, that may have been snapped at a factory or a supplier. However, unlike the renders, they show that the reality of the Mate 40 camera set-up may be a little more uneven in the size and placement of its components.
The part destined for the "Mate 40" has 4 different cut-outs, one of which could be for a flash. The "Mate 40 Pro" camera, on the other hand, has much the same, except for the additional rectangular cut-out found in the approximate center of the glass. This implies the scope for a periscope lens in the upcoming probable top-end variant.