Hi @klclsc,
You can supply the --recursive parameter to the sync command to perform a recursive sync. It is listed in our docs here: https://docs.odrive.com/docs/odrive-sync-agent#cli-commands and also listed in the CLI built-in help (sync -h).
There is also a post I have here that lists some simple scripts to perform recursive syncs, if you want to have more advanced control over the process or perform more advanced automation/scripting using the CLI: How can I force a recursive sync (download) with the CLI?