You choose what to import. Anyway: in case you turn on backup on let's say WhatsApp - it is uploaded to cloud storage and it's not encrypted too. So as a migrat

You choose what to import. Anyway: in case you turn on backup on let's say WhatsApp - it is uploaded to cloud storage and it's not encrypted too. So as a migration solution this one is great, but in case you need to stay it e2e - you just don't use this function.