Any graphql bulk operation to update inventory at a location?

[newbie_01]

As far as I can see, none of the mutations listed here can update inventory numbers.

(productVariantUpdate includes an inventory field, but it doesn't work for updates).

Is there a way to update inventory by the bulk procedure? Or the only way is using inventorySetOnHandQuantities or inventoryAdjustQuantities  looping in batches of 100 SKUs?

Thanks

NOTE: my use case is updating stock at an external warehouse (that fills orders from other stores too) so I can't keep track of inventory by subtracting my own sales.