The beams are already in place?

Can you show pictures of the space?

PPF. beams not in yet. space is gutted. below is pic of ceiling line between old space and new where lvl will go (can see temp support wall here). And pic of layout showing red where beam will traverse (I didn't draw it all the way across though)

There are no good choices but to completely rebuild that portion of the house without the need for a beam, or skip trying to take that wall down. Coffered won’t work. Neither will that beam. It will always look like a terrible compromise to doing the job correctly.