Hi Somesh,
ACS Indexing is not supported, however you can address this by binding multiple external IDPs to your local SP and setting a session variable after login to direct. Here is the info from the APM 17.0
To bind multiple IdP connectors with this SP service, complete the configuration:
Select a connector from the SAML IdP Connectors list in the new row.
In the Matching Source field, select or type the name of a session variable.
Use a session variable only if it is populated in the policy before the SAML Auth action.
For example, select %{session.server.landinguri} or type %{session.logon.username}.
In the Matching Value field, type a value.
The value can include the asterisk (*) wild card.
For example, type *hibb* or south* .
Click the Update button.
The configuration is not saved until you click OK.
To add other IdP connectors, start by clicking Add New Row, fill the new row, and end by clicking Update.
Click OK.
APM saves the configuration. The screen closes
https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-access-policy-manager-saml-configuration/using-apm-as-a-saml-service-provider.html#GUID-77CBAC37-463A-44C7-99C5-E611482680C7
Nimbostratus
