The projects list as of February in their GitHub repo, which includes GNOME and Debian: https://github.com/fosshostorg/fosshost.org/blob/main/src/da...
Googling "fosshost site:debian.org" gave me only two results:
• https://lists.debian.org/debian-project/2020/11/msg00015.htm..., which announces udd-mirror.debian.net to Fosshost. But it was migrated again in June 2021: https://github.com/paulproteus/public-udd-mirror/commit/cbfa... https://salsa.debian.org/debian.net-team/infra/-/commit/69a6...
• https://kenhys.hatenablog.jp/entry/2021/06/12/210011, which announces moving fabre.debian.net away from Fosshost.
Redhat does not own (100%) of GNOME IP, there are many contributors. Also redhat is just a brand asset of IBM, so it cannot actually own anything.