Wikipedia Aurura!
Aurora was first announced in 2015 and to be finished in 2018. It was expected to have a speed of 180 petaFLOPS[5] which would be around the speed of Summit. Aurora was meant to be the most powerful supercomputer at the time of its launch and to be built by Cray with Intel processors. Later, in 2017, Intel announced that Aurora would be delayed to 2021 but scaled up to 1 exaFLOP. In October 2020, DOE said that Aurora would be delayed again for a further 6 months and would no longer be the first exascale computer in the US.[6]
With Aurora planned for mid-2021 and featuring GPUs that were pushed to the end of next year or into 2022, a delay on the supercomputer seemed likely. But Intel kept the possibility open that it might manage to hit its deadline by relying on rival chip foundries. We now know that's not going to happen.
First exascale computer is…Frontier using epyc.
Frontier supercomputer will launch first. As it uses Epyc CPUs and Radeon Instinct GPUs, both from AMD, there are no concerns about its chip roadmap.
https://en.wikipedia.org/wiki/Aurora_(supercomputer)
https://www.datacenterdynamics.com/en/news/doe-confirms-aurora-delayed-frontier-will-be-first-exascale-supercomputer/