As can be seen from the photos, there is a wall that is not attached to a slab and there is a hole underneath it. The wall is slightly outside the perimeter of the slab.
On the other side of the bedroom is the garage. The garage is on a lower slab (ie two slabs at different levels)
Final photo is an image of the slab adjacent to the window. What is that metal strip? Is it some kind of compensation for short slab. Not possible to put hard flooring there because it’s a step and not level.
https://ibb.co/dfYNfQv
https://ibb.co/FHwqysQ
https://ibb.co/5Gd1kBh
https://ibb.co/hgSYqst