I think you're wrong about that. AWS calls this class of storage "instance storage" [0], and defines it as:
> Many Amazon EC2 instances can also include storage from devices that are located inside the host computer, referred to as instance storage.
There might be some wiggle room in "physically attached", but there's none in "storage devices located inside the host computer". It's not some kind of AWS-only thing either. GCP has "local SSD disks"[1], which I'm going to claim are likewise local, not over the network block storage. (Though the language isn't as explicit as for AWS.)
> Many Amazon EC2 instances can also include storage from devices that are located inside the host computer, referred to as instance storage.
There might be some wiggle room in "physically attached", but there's none in "storage devices located inside the host computer". It's not some kind of AWS-only thing either. GCP has "local SSD disks"[1], which I'm going to claim are likewise local, not over the network block storage. (Though the language isn't as explicit as for AWS.)
[0] https://aws.amazon.com/ec2/instance-types/
[1] https://cloud.google.com/compute/docs/disks#localssds