Some more info:
https://it.motorsport.com/f1/news/f1-fe ... e/6006270/
The first updates to the SF21 will arrive for Imola: these are changes that had already been planned, while others are coming, the result of the experiences that emerged from collective tests.
In the wind tunnel, for example, the two vertical bulkheads were tested that McLaren has cleverly introduced under the central part of the diffuser where there is no restriction of the height of 50 mm from the reference plane. It is not certain that the same solution works properly under the Ferrari diffuser. The attention of the aerodynamics is focused on the search for the load and there is talk of modifications to the bottom: the Aston Martin and Mercedes indentation on the trailing edge could be introduced, also introducing other vortex generators in front of the rear wheels.
Even a muzzle with a different integration of the cape that has the task of directing the flow towards the bottom is not excluded. And on the approved 065/6 engine it is not excluded that small updates may arrive on the unconstrained parts to find a few more horsepower.
All seems a bit speculative but let’s see. I honestly hope they don’t spend too many resources fighting for 3rd in the championship - nice if they can do the low-hanging fruit to optimise the package they already have but otherwise focus on 2022. If you don’t get third, so be it - more time in the wind tunnel/CFD for next year.