Raw, jpeg, sidecar setting

Hi everyone. I can't figure out how it works and how to make the display of raw+jpeg files work. If I set the option to not import raw and jpeg separately on LR Classic I see a single photo without the settings I had changed on the camera, a raw file precisely. If I enable the option "Treat JPEG files next to raw files as separate photos" then I initially see the 2 versions of the photo (the raw without presets and the jpeg with presets). When I go into the development module for a single photo as soon as I go back to the library I see both the raw and jpegs the same, meaning I no longer see the jpegs with the presets I had made when shooting. Can someone explain to me what I'm doing wrong or what I didn't understand and how to fix it? Thanks!