Hi,
To my knowledge in standard it is not there, you have to confirm the SF1 and SF2 and have to take the materials into stock, then only you can do backflush for header material.
To you're requirement there is an option called "collective order"
In the collective order confirmation, Once the parent order is confirmed and Goods receipt is done, then automatically, all child production orders are confirmed and goods receipt also takes place automatically, accounting docs are also posted.
Use OPKI to set collective entry to order header so that if you confirm the header all the rest get auto confirmed.
for that special procurement type need to assign in the material master
FERT - Spl. Procurement 52.
HALB - Spl. Procurement 52.
Note: For collective order search in google like where to use and when to use and for what business will be used
hope it will be useful
Regards,
Ravi