sudo apt install awscli installs currently version 1.16.113-1
The official website (https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2-linux.html) supports aarch64 but not armhf.
Is there another way or something that I am missing. The differences between v1 and v2 are not that big but for example v1 does not support --storage-class DEEP_ARCHIVE
Got this to work on a Raspberry Pi 2 by checking out and installing directly from the awscli v2 branch on github.
You'll need to run a modern python (3.6+?), so the whole procedure is isolated in its own venv so as not to mess up system python.
Based roughly on these directions https://github.com/aws/aws-cli/tree/v2#cli-dev-version we get:
$ git clone https://github.com/aws/aws-cli.git
$ cd aws-cli && git checkout v2
$ pip3 install -r requirements.txt
$ pip3 install .
$ aws --version
aws-cli/2.1.14 Python/3.9.1 Linux/4.19.66+ source/armv6l.raspbian.9 prompt/off