The Ostrich issue is confusing to me. One of my closest friends picked up a B25 recently and remarked to me that there wasn’t a CITES and she has had to keep requesting it - for most people, I would explain, but her collection is huge and she says she has always received CITES from H for her Ostrich bags. Did they used to give CITES regularly and stopped more recently?
The law changed regarding ostrich which is why you are seeing a discrepancy versus a few years ago.
Hermes use farmed South African ostrich Strutho Camelus or common ostrich so you do not need a CITES.
It may have been different years ago. There is one now extinct species of ostrich - the Arabian S. C. Camelus but unless H used those birds before the middle of the last century it's doubtful H had any connection.
The ostrich is a success story of conservation, mainly because the birds can be farmed there's a good market for feathers (one of the chief reasons ostriches were over-hunted) skins, eggs and meat. SA even allows hunting wild birds year round, Namibia by hunting season.