I'm currently in the process of knocking down a wall 8 ft across (circled in red in the drawing) to make the room named future den a larger room
That is running near and in parallel with a beam 4 x 2x10 flush beam which runs 16' across over the room and staircase to the garage wall.

There few pretty funky things:
there 2 sistered joists attached to the flush beam with joist hangers but there 2 single joists attached to the flush beam without joist hangers.

few places where the wall meets the joist,and the top plate is not even tightly connect to the joists.

I'm wondering if that wall is load-bearing or not? I would appreciate any help. Thanks