FM posting date issue in extended classic

We are experiencing issue with SRM deriving incorrect posting period when PO changes are made. We are in extended classic scenario with two FM periods open across fiscal years.

PO changes “No further confirmation” and “No further Invoice” from “No” to “Yes”, changes to anything on Account assignment(Asset, GL account, fund etc).

Earlier when we were in Classic scenario, we had FMOD capability to post the FM documents in previous year and current year. Do we have similar functionality retained in extended classic?