Are there any suggestions for preparing a mobile app system design? Most of the courses and threads seem to be focused on backend development.
I hope these help!
This system design course is more about system design on the job, but it is mobile-focused and there is much bigger overlap between "IRL" system design and interview system design when it comes to mobile (which is why I've never needed to properly study for a system design interview): System Design Masterclass: Shipping Real Features To Production