Interesting. In the UK we just need to share account number and sort code. These are quite easy to remember in your head. IBAN would complicate things. Is IBAN always required or only for cross-border transfers?
However, a sort code is always presented as 12-34-56 and the account number normally shown as 1234-5678 - so it's easily chunked and very easy to remember.
You also rarely need it among groups primarily using Monzo - which among my UK friend group is universal. Just pick from contacts, just like Apple Cash.
