I have questions regarding Valuation rate

I have Create Purchase Invoice , Receipt , and even payment but the product valuation rate seems to be always 0 , i know that the valuation rate is based on FIFO but whenever i create sales order it still not auto filled with the current rate

I need help to undertand this

This field should be labeled « Default Valuation Rate ». It is not the actual valuation rate. Actual valuation rate can be different per warehouse and per batch.