Karvy Pool account query

Hi everyone

My father had a demat account in Karvy with a few shares of Reliance Industries. Around March 2021, IIFL took over all Karvy demat accounts and hence i opened an account for him on IIFL.
The point is i am not able to view the RIL shares in IIFL & they are shown as frozen in CDSL demat account.
When i enquired with IIFL i was told to file a complaint with BSE/NSE for claiming the same from IEPF. My question is Can the shares be in the pool account even though i am able to view them in the newly created IIFL demat account?
How can i transfer them to my father’s demat account in Zerodha?
Saw some more unanswered queries relating to the same on other forums as well hence creating a new topic.