On the whole phrases, if you happen to can extract the non-public keys from a pockets, then these non-public keys may be imported in to the native pockets/node app of the fork cash you have an interest in.
Personal keys are the “spending keys” matching public keys or “addresses”; with these keys it is potential to spend the funds in an deal with.
Copay is outwardly an open-source undertaking, so it must be potential to switch non-public keys to fork coin’s native app.
I discovered this hyperlink in direction of that purpose: https://github.com/OmniLayer/omniwallet/wiki/Discovering-and-Exporting-your-private-key-from-Bitpay-Copay
To make use of your non-public keys from Copay with the native node/pockets of Bitcoin Gold (BTG), Bitcoin SV (BSV) and eCash (XEC), it would be best to get these initiatives’ native pockets/node apps and first run them till they’ve downloaded their full, distinct post-fork blockchains.
Then you could import the non-public keys into every of the pockets recordsdata of those cash (normally pockets.dat). Re-starting the nodes will set off a rescan of the blockchains for transactions that pertain to the addresses of their wallets, and render your pre-fork bitcoin cash seen within the post-fork wallets of the fork cash.
Here’s a hyperlink for methods to import keys right into a pockets (bitcoin on this instance) : How do I import a personal key into Bitcoin-Core?
