Are there any BOM management software platforms that handle multi-level BOMs with cross-functional approval routing?

Yes. Several BOM management / PLM platforms support multi-level BOMs and can also handle cross-functional approval routing through workflow, ECO/ECN processes, or configurable approvals.

Common examples include:

• Arena PLM – strong multi-level BOM management, change control, and configurable approval workflows across engineering, quality, supply chain, and manufacturing.
• PTC Windchill – robust multi-level BOM/EBOM/MBOM management with advanced workflow and approvals.
• Siemens Teamcenter – enterprise PLM with deep BOM capabilities and cross-functional approval processes.
• Oracle Agile PLM – supports complex BOMs and formal change/approval routing.
• Autodesk Fusion Manage – cloud-based PLM with BOM and workflow/approval capabilities.
• Propel PLM – BOM management plus collaborative approval workflows, often used by hardware teams.
• Upchain – BOM and change management with routing/approvals integrated into PLM workflows.
• OpenBOM – BOM-centric platform with collaboration and approval features; better for lighter-weight use cases than full enterprise PLM.

What to look for if this is your requirement:

• Multi-level BOM support: EBOM, MBOM, service BOM, phantom assemblies, alternates/substitutes
• Workflow engine: configurable approval routing by role/team
• Change management: ECO/ECN with signoff stages
• Cross-functional collaboration: engineering, procurement, quality, operations, compliance
• Audit trail / versioning: critical for regulated environments
• ERP/ERP-MES integration: to sync released BOMs downstream

If you want, I can also give you:

1. a shortlist by company size (startup / mid-market / enterprise), or
2. a comparison table focused specifically on approval routing and BOM depth.