The help tells me I should unlock my encrypted wallet:
> help migratewallet
...
Requires wallet passphrase to be set with walletpassphrase call if wallet is encrypted.
But when I do so and attempt to migrate the wallet I'm told that I've entered my password for needlessly:
> migratewallet
Error: migratewallet on encrypted wallets is currently unsupported.
<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->
v24.0.1