ZTE was first to the under-display selfie camera with the launch of its Axon 20 5G smartphone earlier in 2020. Now, it has teased an "Extreme" variant of the same device, although how it earns this moniker is not clear at present. What is more certain is that the new 4G-only version of the same phone runs on the UNISOC Tiger T618 SoC.
https://www.notebookcheck.net/ZTE-reveals-4G-and-Extreme-versions-of-the-under-display-cam-Axon-20-5G.505231.0.html