I know about IBAN. But let me correct you: firstly, a single length of characters was not established for the SEPA countries, and secondly, most countries have different lengths, so I believe that in this case, this is a controversial issue.
perhaps, I agree with you. Besides, this is not the only advantage that Neluns boasts. If you do not know, the developers of Neluns, in collaboration with partners, plan to switch to their own blockchain, which will be used for international payments. But this is not immediately, but gradually.