thats one hell of a design error

If thats the case its called temp support jacks, drop something to pick up the loads somewhere and at least get the old support over to the wall

Cover it with carpet or rope, add a few shelves and turn it into an amazing cat tree.

make it a grow or life area. Put a finished granite surface with bullnose edges slightly overhanging, put a fish tank (looks like a 20 or 30 gallon might fit)and/or terrarium the long way with backing at back of tank to not see rear of tank - looks good lit up at night put one fresh water clam in tank for activity and potted plants on the sides rear to hide the tank filer and electric, finish bottom any way you like including stone veneer