From a post by "Fortitude":

Work on the wet weather aero package, which was announced last year, continues, with teams able to work on the package outside their Aerodynamic Testing Restriction (ATR) limits and outside the cost cap. Testing for the new aero kit, which is being constructed to limit water spray, is to take place in Q2 or Q3 of 2023.
Does this mean that the aero testing limits imposed on Red Bull for their overspending will be irrelevant?

. . . "We were testing stuff for the wet but it didn't work in the wet, so we're going to use it for the dry" . . .