Multiple ACS (Assertion Consuming Service) Url support in IDP Initiated Flow

Hello,
I have a requirement in which we need to give support for multiple ACS url for IDP Initiated flow in keycloak. For that we are using the field “Valid Redirect URL” in keycloak to add multiple ACS Urls.

As of now I am able to fetch multiple ACS Url in a list from Valid Redirect URL field, but I am not sure among this list which ACS Url to redirect to, is there any way by which we can decide which redirect url we can select from this list for redirection. On what basis will we select this url.

Has anyone implemented this functionality in keycloak or any other IDP. Please let me know your thoughts on this.

Thanks
Tanmay