Sorry for the late response.

Please try the following CSS code:

#wpforo-wrap .wpforo-content {
   display: flex;
   flex-direction: column;
}

#wpforo-wrap .wpforo-content :nth-child(1) {
 order: 4; 
}
#wpforo-wrap .wpforo-content :nth-child(6) {
 order: 6; 
}

#wpforo-wrap #wpf-form-wrapper.wpfel-4 {
   margin: 0px 98px 0 auto !important;
}
#wpforo-wrap .wpfl-4 .wpf-parent-post {
   flex-direction: row-reverse !important;
}

The code should be added in the Dashboard > Forums > Settings > Styles admin page  "Costom CSS Code" textarea.

In any case please don't forget to delete all caches and press CTRL+F5(twice) on the frontend before checking.

Is it possible to position the Poll below the description (below the post)?

Thanks.