They are heated now, after the Air France loss.
This incident was also the reason for the MCAS system in the first hand: "Don't trust the pilot, regulate it into safety by your own".
"1.6.9.1 Probe heating The probes that are installed on the aircraft are heated electrically to remove water by vaporisation when the aeroplane is on the ground and to protect them from icing in flight."
Reference: https://www.bea.aero/docspa/2009/f-cp090601.en/pdf/f-cp09060...
Even if the pitot tube is heated (mandatory), very often airframe icing leads to a blocked static port, rendering even more indicators useless.