MikroTik is one of the few public organizations who can still get chips from Annapurna Labs after their acquisition by AWS, it seems. Many of their offerings are still using Annapurna parts, and Annapurna still appears as a distinct brand in AWS marketing for its custom silicon, even. I wonder what the specifics of that relationship are.

(Side note but the original Graviton1 was just 16x Cortex-A72 cores, nothing particularly special about it. Actually, all of the Graviton series are just standard ARM cores. But beyond that the SKU they use is indeed the same one AWS uses.)