In the editor, I want to test weapon bomb damage, but I can't see the exact attack damage, because I used mod in the game, so I can see the exact attack damage, but in the editor I don't know how to operate it
You can open the console (~ key) to bring up the console and see the game log. Then search in the top right corner for "damage" and see the log entries related to that.
Please keep in mind that if you don't place a land claim the damage will be much increased as the walls/doors without the land claim are weak (you cannot place them in-game this way as placing walls/doors require a land claim area).
Regards!