Huawei seems to be more focused on launching Huawei Mate X foldable phone in the upcoming Mobile World Congress MWC 2019, it the company keeps going with its mid-range smartphones.
We have various concepts floated on the internet for Huawei Nova 4 but the most credible so far is posted by Ben Geskin,
Since we do not have many details about the phone yet, but the phone is likely to come with the hole screen camera, the display would be full-screen with thin bezels. The front camera would be around 24MP because of single camera setup however, you will have triple AI camera set up at the back.
The rear side is also missing the fingerprint sensor which indicates that the phone will incorporate on-screen fingerprint sensor. The rear side also seems to be little engraved which means the edges are little higher than the entire back.
Until we get more details about the specifications, chipset, memory, storage, and prices nothing can be said for sure, Huawei may launch this phone earlier because it has more devices to get ready for the MWC 2019 event.