How can I find my stocks purchased through ICICI direct from the freshly joined up Zerodha portfolio?

Please help me, find my ICICI direct existing stocks in newly subscribed zerodha account

You will not be able to track shares held in your ICICI Direct demat account from your Zerodha account. What you can do is, transfer these shares from the ICICI Direct demat account to your Zerodha demat account. You can check the transfer process here: How to transfer shares from the other broker to Zerodha?