TWS isn't providing midcourse updates atm, it's reported.
LTWS AMRAAM guidance is possible, but to ensure not losing the L&S, firing an AMRAAM in RWS should cause it to automatically switch to TWS with AUTO centering (it's missing, so it's reported). From there, going back to RWS is still possible, obviously for now you don't need to go back since it doesn't switch to TWS in the first place.