I have my local airflow up and running on macos docker.
Astro CLI Version: 0.26.0, Git Commit: 698219b3b8d7deabb04d7dd190abe6eb3b4623ef
The UI loads, but the example DAG does not show up in the UI. The dagbag on the webserver container is empty as well.
$ docker exec -it d2ff7db91658 /bin/bash
astro@d2ff7db91658:/usr/local/airflow$ cd dags
astro@d2ff7db91658:/usr/local/airflow/dags$ ls
astro@d2ff7db91658:/usr/local/airflow/dags$