There’s currently no easy way to activate inventory item locations in bulk. There’s inventoryBulkToggleActivation - GraphQL Admin, but this accepts only a single inventory item ID, which corresponds to a single variant usually. With inventorySetQuantities - GraphQL Admin, at least we can pass in up to 250 inventory item IDs to adjust inventory at once.
The ultimate goal is to update inventory in bulk, so it would be nice if there was a way to adjust the inventory quantity AND activate at location using bulk operations.
Simply adding bulk mutation support for the current inventory update mutations would solve the issue.