This is a known, long-standing feature request.
Please see:
- https://forum.syncthing.net/t/better-conflict-resolution-in-ui/23689 for a recent discussion on the same subject
- https://forum.syncthing.net/t/update-gui-so-that-file-conflict-occurrences-are-more-prominent/10510 for a similar request dating back to 2017