Yes, the port that grain ship they hit was to deliver grain to.
Chinese and Russian ships have been leaving their ID/tracking beacons on as they have transversed the area since this began. I believe the Houthis attacked a British owned ship carrying Russian oil but I know of no other incidents. As I said, our opinions and five bucks will get you a Starbucks coffee. Let’s see how the shippers and insurers handicap their odds.