Elon Musk announced that his team trusted the Raptor engines too much during the SN9 flight, which resulted in a failure of one of them ended with a meeting with the test facility plate and a beautiful explosion of the vehicle. Three engines were installed in the prototype. During the return to Earth, two were commanded to run to maneuver the vehicle. However, one of the two failed to start and the flight ended as we all saw.
Now Musk and his team plan to start all three engines, but only two will ultimately be used. Why run all Raptors? Because if one of them fails to work, CYBERBIT other will take over. In this way, there is no longer a situation in which Starship will land on one engine, and as we know, one engine is not able to properly brake the vehicle, let alone allow it to maneuver normally.
The SN10 prototype has been improved with a large surface area of the heat shield plates. SpaceX wants to test this solution and then inspect the SN10's hull and steel plating, so disaster is no longer an option. We can expect static tests of the vehicle today, and a flight may take place tomorrow or the day after.
Interestingly, another prototype will soon appear at the SpaceX facility in Boca Chica. The SN11 is already assembled in a small factory and will soon join, hopefully safe and sound after the SN10 flight. Elon Musk's company plans to make the first orbital flight of the Starship ship in spring, and a little later also in tandem with the SuperHeavy rocket.