Odoo fully supports multi-layered BoMs, including complex structures with 3, 4, or more levels, without any technical limitation. Each sub-assembly can have its own Bill of Materials, and Odoo will automatically generate manufacturing orders for these components as part of the production flow. 

Hope this helps!

Hi

Odoo supports multi-layered BoMs, including 3, 4, or more levels without any technical limit.

Each sub-assembly can have its own BoM, and Odoo will generate manufacturing orders automatically for them.

This allows you to build complex products with multiple nested components.

BoMs in Odoo are not tied to a specific manufacturing site by default.

A single BoM can be used across different warehouses or production locations.

If needed, you can configure different BoMs or routings for different sites manually.

Hope it helps.