The process of installing firmware (and the firmware thing in Debian archive as a whole) has changed significantly with Debian 12 Bookworm.
See https://www.debian.org/vote/2022/vote_003 and https://www.debian.org/devel/debian-installer/News/2023/20230219 So, (missing) firmware should be no longer an issue. Closing this bug -- Holger Wansing <hwans...@mailbox.org> PGP-Fingerprint: 496A C6E8 1442 4B34 8508 3529 59F1 87CA 156E B076