I have trouble finding an app or site that can generate multiple addresses from multiple private key's.

They either generate only one at a time, or generate the private key as well.


Any tips?

When the Bitcoin Cash fork happened and you had your bitcoin in electrum wallet all you hade to do was to download electrum cash and you could access your cash.

Any wallet that have stated they plan to do the same for segwit2x?

(Not interested in moving my BTC to an exchange that "say" they will support both)