The new floor introduced by Red Bull in Miami in the Max Verstappen car represented general development by adding aerodynamic load to the car, but did not specifically go to improve the equilibrium problems that the team has suffered so far in the season.
There is an ongoing program to address that, to make the RB21 a more manageable car with a broader range of corners in which you can maintain a good balance. Some of the developments related to this are expected to be seen in the car in Icola.