AIO when my boyfriend said "What? And you're just leaving all the dishes like this?"

My boyfriend and I are in our 30s, and live separately. He wanted to invite mutual friends over yesterday for a BBQ. I arrived at his place early and made a pasta salad, compound butter for the steak, a salad and homemade dressing, a homemade apple crisp, and prepared the veggie skewers for the BBQ while he was getting showered and dressed, and put out the snacks. I cleaned up the kitchen and washed all the dishes I had used for prep.

Later, the BF BBQed the steak and skewers while I set the table. After the guests went home, he cleaned up the BBQ and put away the chairs while I started on the kitchen and the dishes. He came in when he was done and asked me why I hadn't washed all the dessert dishes yet. I said the dishwasher was full and almost done, they could go in it next. He sat down and scrolled on his phone while I kept cleaning for a few more minutes. I was kind of annoyed that he didn't come and help me. I figured we were both just tired after the long day. I packed up my serving dishes and kitchen stuff and told him I was heading home. As I was heading out the door, he came over and said, "What? And you're just leaving all the dishes like this?" in an annoyed tone. I said yes, and goodbye.

Today over text I told him that this comment made me feel unappreciated and as if he thought cleaning was my "job" to do, and that I had already put in a lot of effort for the day. He said he didn't mean it like that. He said what he MEANT by those words was, "Can we align on what's left to be done?".

Am I over-reacting to keep insisting on an apology for that comment? He has a history of not admitting he is wrong or apologizing so I am riled up when he does it, even though the issue might be small.

Am I being petty here?