That doesn’t make any sense to me. It can be installed directly from pacman. It may be something silly like adding docker to your user group. Have you done something like below for docker?

1. Update the package index:

sudo pacman -Syu

2. Install required dependencies:

sudo pacman -S docker

3. Enable and start the Docker service:

sudo systemctl enable docker.service
sudo systemctl start docker.service

4. Add your user to the docker group to run Docker commands without sudo:

sudo usermod -aG docker $USER

5. Log out and log back in for the group changes to take effect.

   Verify that Docker CE is installed correctly by running:

docker --version

If you get the above working docker compose is just

sudo pacman -S docker-compose