SAP BW refreshes are not supported via Tableau Bridge.When clicking "Test connection" in Tableau Bridge after entering data source credentials, the following error might occur:
"Incorrect username or password for this data source. Confirm that you have the appropriate permission and re-enter your credentials".
So that we need to update SAP BW data sources is to republish them.
Kindly make an enhancement and review for possible inclusion in a future release.