Inventory- UOM Conversions Issue

I have created a FG named Spoon which is sold in dozens and in Kgs, Defined 1 Dozen = 0.45 Kgs

Purchase a steel sheet in Kgs, created a BOM for Spoon in which RM will be steelsheet.

While taking stock entry of Spoon after manufacturing I want to change the Conversion factor defined as weight of my spoon during manufacturing has been increased to “0.50” intead of 0.45 which was default set in item master.
I also want the the same dynamic feature during delivery or sales order booking.
Note- I m able to change my default conversion factor on PO or Purchase receipt but not during Stock entry of manufacturing and sales cycle.
But not getting the same in Manufacturing and Sales Cycle