Securities ceased to exist ($NRGU, $BNKU). How can I add them?

Hi everyone, my first post here.

I would really like to give it a shot to Portfolio Performance, instead of simply growing my google sheets, however, I don’t know how/if I can add two leveraged ETFs (they were technically ETNs) named $NRGU and $BNKU I transacted a few years ago (they were only “delisted” recently). I have all their daily prices for the timeframe corresponding to the transactions. Is there a way to add them somehow so that I can add the corresponding transactions to my accounts?

Many thanks in advance.

Tiago

Then maybe the best approach is to import them via csv import.

thank you. I will try to understand how can that be done. appreciate your response.