Your wallet can be recovered entirely from its <em>seed</em>: the chain of words generated by *Electrum* when creating the wallet. But if you lose your seed, you lose your entire wallet.
In the past, different wallets have worked with different versions of Debian.For example, Trezor hardware wallets stopped working in Debian 12 (Bookworm), so they don't work in Tails6.0 or later.