Nothing is confirmed. Half of Bangkok is probably built with this rebar and those buildings are still standing.
This reeks of a pseudo investigation for normie public consumption. Bad rebar ! 3 days after the earthquake and the investigation is done. Bad rebar made the building collapse. What a joke.
It takes 28 days for concrete to cure. When was the last pour? Is it normal for buildings to be earthquake proof while they are under construction? Google says no. No, half-built buildings are not inherently earthquake-proof; their seismic resistance depends on the design, materials, and construction methods used, which are typically not fully implemented during the early stages of construction
Nobody knows why this building collapsed. There hasn't been an investigation. Has the engineered design of the building been checked ? 3 days in ? There could be something wrong with the engineering of the building. But we don't know yet. My guess is the partial state of construction of the building and the 7.7 magnitude earthquake that it was in the middle of played a part.