Hi,

I redeemed a 1 BTC Casascius coin a few years ago for BTC, BCH and BTG.  However, I understand there are other forks that I missed out on such as BSV etc.  When I try to use the private key there are no funds available for these other forks. 

Is that because once redeemed the private key becomes public and anyone can then use it?

Is there anyway to recover lost forked coins from redeemed Casascius coins?

Much appreciated.