I look at the vault folder, date/time, file type, often this gives me a clue if I can delete the conflicts.
99.9% of the time, I can delete with no issues. If I am unsure, I leave the conflict. In a week or so, it usually is obvious it will be okay to delete the file.
Keep in mind these are text files, they are most likely not hurting anything if they remain in my vault folder.
I do not have Syncthing automatically start on log in. This helps decrease the number of conflicts. I sync at the end of the day or end of working on Obsidian. This is a conscious choice.
Additionally, I do not sync every day. Even though I work on Obsidian almost every day. If something is mission critical or I need to review files in the evening, I sync. If these aren’t true, I don’t. I still have my vault folder.
Hope this helps a little.