FBA Inbound API v0 depricated DEADLINE = DEC 20, 2024 - new API version v2024-03-20 missing features, not functioning properly

We switched to v0 of the FBA Inbound SP-API (moving over from MWS) late March 2024 ... right before the deadline to move to SP-API.

Aweek later we were told "v0 is outdated, you need to switch to v2024-03-20 which just came out" and were given a deadline of the end of 2024.

We are currently trying to switch from v0 to v2024-03-20 and it's a nightmare. What use to be a single call now takes multiple and is slower -- and the API is not returning any results for "listPlacementOptions" (just empty arrays)... not only is it returning no results, it's not returning any errors.

I opened a case and they said:

"Currently there is no option for defining prep category from API, in this case you have to go to seller central shipment's step 1 page. In step 1 of the page you will see error beside the problematic skus. Currently, our tech team is planning to add defining prep category from API with the next release."

So we are being forced to use a new API by a specific deadline that isn't even complete -- and we have to *manually* set results in Seller Central?

We were then sent to this page and told we needed to manually set prep types for items, and once those items had prep types set, we could then use our API.

https://sellercentral.amazon.com/fba/sendtoamazon/confirm_content_step

We re-tested our API code using specific SKU(s) that had prep types selected, and we are getting the same results (empty results) with no errors.

This new version of the API is *NOT* ready for prime-time. I have no idea why we are being forced over to it. Another seller is reporting missing functionality as well related to SPD:

https://sellercentral.amazon.com/seller-forums/discussions/t/5562b7df-eb2b-4531-8e6a-bfd5990cefa3?postId=fdbdb5da-a7af-4767-bbac-58c5d4ff3d93

Is anyone else having this issue? Details below

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We are calling:

createInboundPlan

generatePlacementOptions

listPlacementOptions

All calls are "successful" -- but "listPlacementOptions" returns empty results:

$VAR1 = {

'pagination' => {},

'placementOptions' => []

};