The politicians said the collapse was due to climate change:

Engineers who have visited or examined photos of the wreckage of the Champlain Towers South condominium complex have been struck by a possible flaw in its construction: Critical places near the base of the building appeared to use less steel reinforcement than called for in the project’s original design drawings.

Source: Surfside Condo Wreckage Hints at First Signs of Possible Construction Flaw

Typical of large system failures, there are often multiple factors and these will not be known for some time.

Coldstreams Skeptic