So far, most news has clearly stated interest is accrued, not waived.

BNM wrote to every banks to tell banks to adopt automatic moratorium (AM).
Individual bank will inform how they carry out the measure.
So, I believed customer will be informed by banks about the details about that AM later on.

So, how existing SI or auto-debit payment will be affected, wait until individual banks information then, which I believed will come out soon.