need advice: brick refill and floating beams

Hey folks, I hired a demolition company to remove a big concrete section under my patio roof because it had started to sag and didn't look safe to keep.

Now there’s an L-shaped hole (1.5m x 1m), and some beams are floating instead of sitting on the brick structure.

I think some structural work is needed here, to support the beams. What kind of work is this called? And what type of tradesperson should I hire—builder, carpenter, or someone else? Any advice would be great