What I'm aware of in the industry is that the large ones use SAP. Dunno if SAP provides that from scratch or if it's custom-built though, but I'd take a guess that it comes with their standard inventory/materials tracking/invoice handling package.
Edit: looked it up, yep, part of SAP HANA LO-BM [1].
Why wouldn't they? They bought a number of established and emerging solutions and integrated them into their business licensing and sales, upgrading them as their platforms evolved. Some date back 40 years, starting as a standalone DOS program, now a SaaS.
Edit: looked it up, yep, part of SAP HANA LO-BM [1].
[1] https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/4eb099dbc8a6...