As I understand it, using
dumpwallet for a non-descriptor wallet in Core will give you the wallet seed in WIF format. This seed can then be used with
sethdseed in a new wallet, thereby recovering the original wallet. So in effect, one can make a paper backup of a Core wallet.
But with descriptor wallets,
dumpwallet does not work.
Is there a way to make a paper backup of a Bitcoin Core descriptor wallet?