Docker does not have docker compose

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Installing docker with `sudo apt install docker.io` claims to be docker version 24. This should have the command `docker compose`, but it doesn't. `docker compose` was added back in 2020, with version ~20.

Installing docker with `sudo snap install docker` claims to be older, docker version 20, but it has `docker compose` available.

Why isn't docker.io proper docker with all available commands? Is it the wrong version? If this package is not standard docker then you should remove it from apt.