You can create sets of ID token signing keys in PingFederate, and map each set to one or more virtual issuers for OpenID Connect.
When minting an ID token, PingFederate signs the ID token with a key from the right key set based on the authorization request, virtual issuers configuration, and token signing keys configuration. Because of these features, you do not need multiple PingFederate environments to support multiple brands, which especially helps if you participate in Open Banking in the UK or have similar requirements.