Do you mean a counter-height peninsula with a raised bar? I think 20" will be very generous for a raised bar, but how will it be supported?

It’s a raised bar, likely the standard 42”. The GC said they would have to add support. There is plenty of room. Wife and I will eat dinner there at night, which is why we are adding a TV above the fridge. Will also be used a lot for parties and get-togethers. The peninsula will go just in front (out of picture) of the cabinets you see at the very bottom of the picture. There will be a sink in that cabinet set.

TV goes just above the Subzero fridge large cutout on left. MUA and HVAC vent to left of TV. Fridge is French Door, flush install, hence the 7” border on left part of frame to allow for full articulation of the Left door. 30” Wolf M-series bottom right, Wolf CSO above (incorrectly framed at the moment).