Retrofit acoustic parking aid

Hello together, has someone here perhaps already equipped an acoustic parking aid and can report whether this can be done without major problems? We have a Space Star from the end of 2022 with a rear camera, but “small infotainment system” (without integrated navigation). The RFK is theoretically enough, but it has happened to us more often that we look into the mirrors and “rely” from experience on the use of the piepton, because we “spoiled” it from the other cars. ind. Is this possible easily or is the installation a huge effort? Maybe someone here can report that already did this? Greetings