Hi Anandhan,
Just follow the below steps.
1. You remove newly created overview from the viewset in runtime repository so that you will not be able to see your custom assignment block in BT116QH_SRVQ.
2. Just create a new window in BT112H_SC component and add your required assignment in this window.
3. Then add window created in step2 in interfacecontroller, now your assignment block is ready to use in BT116QH_SRVQ.
4. Create a component usage in BT116QH_SRVQ and select the BT112H_SC and newly created window while creating component usage.
5. Add this component usage in main view set BT116QH_SRVQ/OVViewset and check in configration, new assignment block should be available by now.
Let me know you are able to complete it and able to see the assignment block.
Best Regards,
Dharmakasi.