Exactly a week ago, I uploaded some license plates, they still haven't published the mod yet, and that's not normal, because I had to wait around 3/4 days for the other mods I uploaded. Is there an explanation to this?
Usually a few days, depends on the existing mod queue. It is possible your mod was missed, or left behind by mistake. If this happens, you can ping @synsol or use the Author/Moderator discussion tab on your mod's page (which also does the same, on the context of that mod)