Depends on the bank. In Germany, N26's free account charges 0.49€ per instant SEPA transfer, and sometimes it's unavailable because the other bank (e.g. one used by many German doctors) only supports non-instant SEPA.
But yes, instant SEPA is often free and often available and very nice when both of those are true.
But yes, instant SEPA is often free and often available and very nice when both of those are true.