I posted this in another thread. However that thread had nothing to do with FE, so I am repeating here in case anyone missed it.
Starting with the 2020 season, FE cars can enter Majors/Runoffs as FE2. They will be classed and scored as FE2. Their entries will count toward FE2 Runoffs class qualification requirements. Of course, FE cars will likely not be fully competitive with FE2.
This is implicit in the January 29020 GCR, but not stated directly.