Bip39 Online. You'd probably then do a standard Restoration which has a command much like the just one under. (This command works by using a sample wallet file bunlded with BTCRecover) Anybody else who discovers the phrase can steal the bitcoins. It have to be saved top secret, for instance https://mysterybookmarks.com/story19428179/bip39-passphrase-https-linktr-ee-bip39-getting-my-bip39-passphrase-to-work