MediaTek's new MT8195 and MT8192 chipsets are the company's newest Chromebook-centric chipsets. The former is powered by ARM's latest Cortex-A78 cores, while the latter uses previous-generation Cortex-A76 cores. Both chipsets use the same ARM Mali-G77 GPU, though. They are expected to hit the market in Q2 2021.
https://www.notebookcheck.net/MediaTek-MT8195-and-MT8192-launched-6nm-chips-billed-to-power-Chromebooks-tablets-smart-displays-and-more-starting-Q2-2021.503471.0.html
The press release says Mali-G57, not G77:
corp.mediatek.com/news-events/press-releases/mediatek-announces-new-mt8192-and-mt8195-chipsets-designed-for-next-generation-of-chromebooks
I was checking it out after reading this recent story:
chromeunboxed.com/mediatek-mt8192-snapdragon-7c-chromebook-benchmark-speed