This seems to be the result of an emergency switch over the Easter holidays to D-TRUST BR Root CA 2 2023 (which has been around for > 2 years). The status of the adoption of this root CA by Apple is unclear. As far as I am aware, Apple isn't part of ccadb.org and they don't publish, if the certificate was every submitted to them.
Anyone here that can help the BSI out of this pinch?