i am in same situation with NDVO , medicals completed in march but online status still shoe medial request send. checked with physician, he said medicals were send in march.
I think VFS are open with limited capacity from last week. did they receive any special instructions with the request? when did they receive the biometric request ?
if your sibling is mentally or physically dependent on your parents. They qualify as dependent. i have applied for my sibling in same way and his application is still in process.
I think you can send death certificate and ask them to make your dad as primary applicant. Someone else went through this process and was able to change dependent to primary. it will take some time as CIC working with low capacity. Take care !
i would say you can use something else rather then your dad passport. like your dad school certificate and your grandparents marriage certificate. something which has same name