The UN Secretariat does not have a single IATI go-to person right now, but we’re talking about that inside OCHA. You might as well reach out to me, and I can try to answer any questions or direct them to the right person.
Yes, FTS stopped republishing IATI data in 2015, I think, because of concerns about duplicate reporting (some of the orgs they were republishing were also publishing directly). The financial data is still available via FTS’s API, and you can find a lot of individual project information there (much more than used to be in OPS): https://api.hpc.tools/docs/v1/
CERF and CBPF are pooled funds that OCHA manages on behalf of the humanitarian community. They exist because during a humanitarian emergency, there needs to be money available right away, without waiting for fundraising and earmarked donor grants.
CERF (Central Emergency Response Fund) is an unearmarked fund that many donors contribute to, and it’s used to help with underfunded emergencies in any country where there’s a need. Donors pay in without knowing where or how the money will be spent.
CBPF (Country-Based Pooled Funds) are a collection of lightly-earmarked funds that donors contribute to, and they’re used to help fund activities/projects in specific countries as the need arises. Donors pay in knowing where the money will be spent, but not how it will be spent.
While OCHA reports on these funds, neither of them is actually OCHA’s money, per se. The funds are intermediaries between the donors and the implementing orgs or agencies, and they can make IATI traceability very challenging (it’s like trying to the trace the origin of a cup of water you pull out of the ocean).