You mean something not like EC2 Accelerated Computing Instances?

https://aws.amazon.com/ec2/instance-types/#Accelerated_Compu...

Edit: I didn't see the parent meant a hardware accelerator created by Amazon itself. Thx to @jsty and @paol for pointing this out. An ASIC by Amazon was announced last year and is known as 'AWS Inferentia'

https://aws.amazon.com/machine-learning/inferentia/

https://perspectives.mvdirona.com/2018/11/aws-inferentia-mac...