Need advice on domain shift

Hello guys, I complete my bachelor's in CS in July last year. I have been working as a Full Stack Developer, and I a quite decent in this domain. I worked with multiple startups and have a decent Job. I also worked at DevOps role for an year.

But now I feel the domain of Full Stack as boring, everyone is doing that. With all those frameworks it's not that challenging now. I recently came across ROS2, and was impressed by it. I am thinking of learning for Robotics side by side for an year and then apply for Masters next year. What do you think about the scope of it. Other alternative is to go in some Cloud + AI niche, but I don't want to stay in Full Stack that's for sure. I hope I can get some guidance.