What I'm trying to say: robotics is a very broad field and your current full-stack skills are needed just as well. And while working on those aspects of the robotics stack you can learn about the rest if you want. But you don't even have to to progress in your career in the robotics industry.
If you want to work on something specific, you can try to build a capability ("full-stack app") on Transitive, the open-source full-stack framework for robotics we've built that works with any robots, esp. ROS ones: https://github.com/transitiverobotics/transitive. Oh and of course learn ROS along the way.
Start using those technologies and building things. Write or at least post about it on X and follow related engineers on X. See kache's robotics journeyman community as one place for inspiration.