Yes, it can be using subpath while mounting a volume subdirectory to a container. However,

• volume must exist beforehand and

• subdirectories must be created before containers attach to it

To create a volume with subfolders, I made a utility function for me to use. I do:

# source the function
source create_volume_with_folders.sh 
# create a new volume with however many folders you want
create_volume_with_folders home_data pgadmin pgdata

After that, pay attention to setting external=True for the volume in docker compose file. See from my create_volume_with_folders.sh Gist.