Turkish construction in old building

Hello everyone,

I have been reading along in the forum for a while now. Last year, we bought an old building including an extension and are now in the process of renovating it. The main house was probably built around 1935 (+-). The extension is from the 70s.

Now I would like to brick up a wall opening (with a door in it). Actually a simple matter. However, instead of masonry under the door frame, I found wooden beams (see picture).

Since I wasn't sure, I first supported the thing and then made an appointment with the structural engineer. Nevertheless, I wanted to ask here in parallel:

How does that hold up (especially the beam that is probably in place of the lintel)?
Should the wooden beams be completely removed or bricked around?

Since this wall will later be part of the kitchen, I naturally also want to hang cabinets there.

Regards

Do I understand correctly that the old door opening is going to be bricked up and later a kitchen will be built in front of it? I would assume that you won't have any problems during the kitchen installation, whether you screw into the wooden beam or into the surrounding masonry. The beam still seems to be in good condition in the pictures. As long as it is not completely soft and rotten, I would leave it inside and simply brick it in. The only problem I see is that when plastering, there might be some extra effort needed to avoid cracking, as wood can still shift a bit.

So, how is it now, the wall is brick-built but there are wooden beams there or is the wall also lightweight construction? I wouldn't necessarily support it, it looks in the picture as if the wall is as thick as the beam, so pretty thin. Probably not load-bearing, meaning one should probably avoid transferring ceiling loads above it (that's why there should be a gap between non-load-bearing walls and the ceiling, so no loads rest on it)... Warning, layperson's opinion, a structural engineer should be able to answer that. My personal solution approach would be a lightweight construction with wooden slats, insulation, and fiber gypsum boards, but that is a matter of personal preference.