How would I know?
Do a docker ps -a to check whether the container was created at all and, if so, a docker logs homeassistant to check the logs.
Here is the list of container from a working RPi3 installation:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4f5f94eea9db homeassistant/armv7-hassio-multicast:2021.04.0 "/init" 40 hours ago Up 40 hours hassio_multicast
0194e6f1cb88 homeassistant/armv7-hassio-cli:2021.05.1 "/init /bin/bash -c …" 40 hours ago Up 40 hours hassio_cli
d63d8a6f1519 homeassistant/armv7-hassio-audio:2021.04.0 "/init" 40 hours ago Up 40 hours hassio_audio
715a09716588 ghcr.io/home-assistant/armv7-hassio-dns:2021.06.0 "/init" 40 hours ago Up 40 hours hassio_dns
3d6dced4960b ghcr.io/home-assistant/raspberrypi3-homeassistant:2021.7.1 "/init" 4 days ago Up 21 hours homeassistant
8fce152354c3 homeassistant/armv7-hassio-supervisor "/init" 9 days ago Up 40 hours hassio_supervisor
834dacfc43a5 ghcr.io/home-assistant/armv7-hassio-observer:2021.06.0 "/init" 3 weeks ago Up 40 hours 0.0.0.0:4357->80/tcp hassio_observer
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ef9c1632f501 ghcr.io/home-assistant/amd64-hassio-cli:2021.05.1 "/init /bin/bash -c …" 22 minutes ago Up 22 minutes hassio_cli
9bff9da2dd1b ghcr.io/home-assistant/amd64-hassio-audio:2021.04.0 "/init" 22 minutes ago Up 22 minutes hassio_audio
ce3473d92d56 ghcr.io/home-assistant/amd64-hassio-dns:2021.06.0 "/init" 22 minutes ago Up 22 minutes hassio_dns
d5b31c3de861 homeassistant/amd64-hassio-supervisor "/init" 22 minutes ago Up 22 minutes hassio_supervisor
root@vicsserver:~# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ef9c1632f501 ghcr.io/home-assistant/amd64-hassio-cli:2021.05.1 "/init /bin/bash -c …" 30 minutes ago Up 30 minutes hassio_cli
9bff9da2dd1b ghcr.io/home-assistant/amd64-hassio-audio:2021.04.0 "/init" 30 minutes ago Up 30 minutes hassio_audio
ce3473d92d56 ghcr.io/home-assistant/amd64-hassio-dns:2021.06.0 "/init" 31 minutes ago Up 31 minutes hassio_dns
d5b31c3de861 homeassistant/amd64-hassio-supervisor "/init" 31 minutes ago Up 31 minutes hassio_supervisor
ae3612dce494 hello-world "/hello" 33 minutes ago Exited (0) 33 minutes ago trusting_babbage
Is what the ps-a gives, the log says there isn’t a container with the name “homeassistant”.