I dont see this option so I probably need to have a look at your suggested BOM/routing settings. How do i find this? 

I tried the following: 
=> Manufacturing
=> Items
=> Selecting the item 
=> Inventory Tab 
=> Operations Routes 

But no luck to enable the mentioned feature. 

Yes, you can partially produce work orders, but this functionality is not enabled by default in Odoo.

To achieve what you're looking for — reporting partial production at the Work Order level, similar to how you can set "Quantity Produced" in a Manufacturing Order — you need to:

Enable "Record Production" manually on the Work Order

1. Go to Manufacturing > Operations > Work Orders
2. Open the specific Work Order.
3. You'll see a button like “Process” or “Mark as Done”.
4. Once inside, look for the "Produced Quantity" field at the top (may appear as a pop-up or inline depending on the version).
5. Enter the partial quantity (e.g., 20 of 50).
6. Validate.

This will update the progress for that step and allow tracking partial completions.

Note:

• This only works if backorders and partial production are allowed on the BoM/routing setup.
• The next Work Order in the sequence will remain blocked until the first one is fully done (as per your sequence setting).
• For more flexible partial handling (e.g., allowing downstream steps to start), you'd need to customize the routing logic or use Work Centers in parallel.

If you need to frequently process partial quantities per operation, you can also consider enabling "Work Order Time Tracking" in settings and customizing the flow to suit your shop floor needs better.