Purchasing with Lean manufacturing

My company is currently implementing D365 F&O, and we were quite surprised to learn from our SI there is not functionality within it to support circulating cards or even kanban sizing for purchased items within Lean manufacturing.  Apparently there are work arounds requiring hundreds of hours and lots of money, or we can use min/max functionality to manage, which will result in higher inventory levels as we use more than a two-bin system in many cases. Indeed managing inventory is a critical piece of Lean methodology, and eliminating waste in purchasing is a vital component.  We also were given the impression the module is not greatly supported, and Microsoft may be going in a different direction away from it. Lean manufacturing capabilities were a big driver for us choosing D365 F&O, and we'd like to utilize and optimize it if at all possible.  Does anyone have experience using Lean manufacturing for purchasing activities?  Thanks!