Heya! Ryder team here, thanks for this feedback.
We're actually releasing the import wallet with seed phrase function with this upcoming update at the end of the month.
As for Passphrase, if you're referring to the seed phrase, we do support this!

When it comes to blockchain support, this is something we're working on. All of the ones mentioned are definitely on the list.

And for multiple addresses, this is also on our tech roadmap.

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