Improve Volvo V60 T6 Twin Engine chassis

Hello to each other, after my V70 T5 I have now bought something completely new. A V60 T6 Twin Engine from 2019 with 120,000km, one of the last of the still more than 180kmh runs Generally I am very satisfied with the car after the first 5000km, driving feeling is very good, electric range is usually (0°- approx. 33km), power is more than sufficient. The only thing that bothers me unfortunately is the chassis. It is generally i.o. but unfortunately a little too tight compared to my V70 before/after lowering. The chassis is equipped with 4C but this only changes the damper rate to my knowledge and has nothing to do with the spring strength. A nice gimmick but in my opinion hardly really noticeable. I wonder if there is a possibility to change the firmness of the chassis with e.g. other springs or rims/tires (currently 18inch 235/45). I have also seen that there is a KW V3 also for the V60, there is possibly a report of experience in the comparison. with the original chassis. I would be very happy about tips if someone has something that could help.