I've found that too. It was my first piece on the subject and I hadn't found an environmental publication at that time. And it was timely, so I wanted to publish while COP was in Glasgow. I was waiting for Age of Awareness to add me as a writer, but they took weeks!
Saying that, my stuff in Age of Awareness sinks too. As you say, I don't think a lot of people are very interested. I do contribute to Climate Conscious sometimes now, but they rejected my last submission. Bastards ๐๐คฃ๐ Joking.
Age of Awareness published it instead and it flopped. ๐ I keep trying to encourage people to do their bit. Now I dress it up as saving money due to the cost of living crisis. They're more interested in that.