Hi Alnavasa, and welcome to the forum.
The forum has a useful search facility located close to the top right corner of the page you are on, though often it is helpful to narrow the search. Can I suggest that if you go back to the main page and first select “Modifications and Equipment.”
On the page that comes up go to the search entry point in the top right corner and type in “Swimming platform” or, I found “Swim Platform” gave more results, although not all were entirely relevant to your specific question. One, or more of them, however showed a rope tackle arrangement which was set up so that it lifted both sides of the platform evenly. There were several comments in that specific thread and in others which may answer your particular question.
Fortunately for me my boat is older than yours and does not have that kind of stern arrangement, but I’m fairly sure that a cure was found.