Yes, your understanding is correct. In Odoo, instead of creating separate Bills of Materials (BoMs) for each variant, you can create a single BoM that includes all the necessary components and then specify which components apply to which variants. This way, you can manage the operations more efficiently.

Create a Single BoM:

Create one BoM for the product template that includes all the possible components across all variants.

Link Components to Specific Variants:

In the BoM, for each component, you can specify which variant(s) it applies to. This is done using the "BoM Variant" field. This means that only the relevant components will be used when manufacturing a specific variant.

Allocate Work Orders to One BoM:

Since the operations remain the same for all variants, you can allocate the Work Orders to this single BoM. Odoo will automatically adjust the components based on the variant being produced, but the operations will stay consistent.

I believe my main problem is that I have created different BoM for each Variant. Could it be that I can only create one BoM but put all components there but only link them to specific Variants?

If I only have one BoM then I only need to allocate the Work Orders to one BoM?