You could write your own script to call the Airtable API. Note that you’ll need an Airtable Enterprise plan to fully use the API, but you could get around it with something like BaseQL: https://baseql.com/
You could use an ETL solution like Fivetran or Airbyte if you’re just trying to move the data one way (i.e. Airtable to Postgres).
You could use a “circular” ETL solution like Bracket (https://www.usebracket.com/) if you want to sync bidirectionally, i.e. you want changes from either source to be preserved in the other.