It’s true, often CJ designs arrive in batches over a period of time and SG brings in selected designs. If you are a regular, SA would be able to check and tell you if a design is being brought in or not. If it’s not brought in, you can ask if there is a similar design being brought in as the Chanel website doesn’t show the full range of CJ. Chanel always release various designs with the same elements - playing around with the length, shape etc.
Also, did you try going into the store yesterday? The display changed yesterday to reflect 23B, so some items not available for purchase previously may now be. For MBS though, I noticed only one new pair of earrings design has arrived as compared to during the weekend’s soft launch.