It depends on your job description. Usually Android/iOS developers do not need to work on backend/server-side/api end work. But if your company is a small team and everyone wear different hats, you might need to handle some of the backend services.
I am a front-end web developer at my current job, I have seen my co-workers (Android/iOS) never have to touch backend code, we have dedicated team for that. But in my side projects and/or product that I am building full time, I handle backend, front-end, DevOps, and all other technical stuff!
Being a nocode sass founder I think a lot about what people think of nocode tools especially when it comes to developers. We, as nocode makers, try to make people's life easier, want to allow them to create their own product without having any technical knowledge. But on the other hand, I am very interested to know what developers think about nocode tools when it comes to their career choice. I would love to read comments on this thread :)
I am a front-end web developer at my current job, I have seen my co-workers (Android/iOS) never have to touch backend code, we have dedicated team for that. But in my side projects and/or product that I am building full time, I handle backend, front-end, DevOps, and all other technical stuff!