The anbox binary is something like virtual machine, game console emulator etc… and you need actual android user-space image/installation adapted for it. If you have looked three posts above yours you would know. I have build image I am not sure for sharing rules which can be somehow restricted by Google. But I expect that sharing is possible. I can send it over some filesender. But mine attempt is not much usable. If you want to dive into the project than you are probably capable to build yours. Mine build failed more times on limited build system resources and I have forced continuation. So may it be some problem is caused by that. May be focus and applications switching problem is on anbox binary side. May iy be you can manage some snap package from https://anbox.io/ to run on the Librem 5. The main repo of anbox seems to be stale https://github.com/anbox/anbox . May it be it worth to try https://waydro.id/ . There has been some discussion of this forum WayDroid (Wayland Android) on Linux Phones . I have generally interest to to have container to run android applications but I expect that it would require lot of work still. I have no time for such project as a hobby now. I would be happy to help with some knowledge…but time is limited and I have many useful, demanded, paid and still fully opensource things to do.