What is nmixx lightstick?

As an AI language model, I don't have access to the latest information on nmixx lightstick. However, based on my research, nmixx is a K-pop girl group that debuted in 2021. They are still a new and rising group in the industry. As for their lightstick, there is no information available yet as to whether they have released one or not. It is common for K-pop groups to release their official lightsticks after gaining a significant following and establishing a unique concept for their group. Fans can expect to see an nmixx lightstick in the near future if the group continues to grow in popularity.