Backflush batch managed components to Serial FG - REM

Hi Experts,

we are using REM and our FG is serialized (and not batch managed). we have a requirement to trace what components went to this serial number.

While I do MFBF, if I mention batch number for the components, is there any report to see what batch number went into the serial number that I GR at later point?

I think this is pretty easy in DIM, because the production order will give me the batch components and finished good serial..but how can I achieve this link in REM?

side note: I have read that if I activate multibatch evaluation, then I can get link between finished good batch and component batch in REM. but unfortunately my finished good is not batch, its just serial managed.