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Note that an ID Token also contain values for the amr and acr attributes, corresponding to the IDP actually being used. These values may be different from corresponding values provided in the request from the OIDC Client to the Authorize endpoint. One example is if more IDP options meet the amr/acr criteria of the Authorize request. In this case an IDP selector dialog is presented for the user to resolve which IDP to use. Another example is when xID performs a step-up to BankID.
See further details of separate pages for each of the supported IDPs how the IDP can be governed via login_hints or JS Connectors.