They are the first in a new series of Helio processors

MediaTek introduced a new line of 12nm-based Helio processors with the Helio G90 and G90T. The new line will be the Taiwanese chipmaker’s flagship processors, and come with Cortex-A76 and Cortex-A55 cores, with one of them sporting a 2.05Ghz clock speed. On the GPU side, the Helio G90 and G90T will use a Mali-G76 GPU with clock speeds of up to 800Mhz.
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https://www.unbox.ph/gadget/mediatek-announces-first-gaming-centric-processor-with-the-helio-g90/