Why Is the Item Only Under MFN?
If an item appears under MFN but not FBA, AccelerList may currently be receiving that SKU as merchant fulfilled from Amazon.
Amazon treats FBA and seller-fulfilled inventory as different fulfillment options, and sellers can use either or both depending on the products they sell. Sell on Amazon
Search by SKU
Search for the specific seller SKU rather than only the product title or ASIN.
This is important because the same product may have different SKUs associated with different fulfillment methods.
Set Your Inventory Filter to All
Change your inventory view to All and check whether the item appears.
Also review quantity filters. A SKU with a quantity of zero may be hidden if your current view only displays inventory with available quantity.
Compare With Seller Central
Check the same SKU directly in Amazon and confirm its current fulfillment method.
If Amazon shows it as MFN, AccelerList displaying it under MFN may be expected. If Amazon shows the SKU as FBA while AccelerList continues to show it only under MFN, contact Support so the synchronization can be investigated.