Only pilots eligible for the MOU could go, and they could only fill the JQ MOU slots on the QF list. However, those 6 slots were withdrawn as the MOU only specified command positions. No FO. It’s entirely plausible that JQ FO’s have been offered what you said, but it would still mean going through the recruitment process, and the seniority number would be the next one available on the list (somewhere around 2300).
Currently the JQ MOU slots are at the level where you’d get a 737 FO anywhere, or a PER 330 FO. But as I said, MOU was intended for command only.