Anbox fails to start
It looks like Andbox expects to find the DKMS modules and fails when it can't.
$ sudo systemctl status anbox-container-manager.service
● anbox-container-manager.service - Anbox Container Manager
Loaded: loaded (/lib/systemd/system/anbox-container-manager.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2020-08-10 23:18:44 CEST; 2h 34min ago
Docs: man:anbox(1)
Process: 3445 ExecStartPre=/sbin/modprobe ashmem_linux (code=exited, status=1/FAILURE)
Process: 3446 ExecStopPost=/usr/share/anbox/anbox-bridge.sh stop (code=exited, status=1/FAILURE)
aug 10 23:18:44 djhg2000-pinephone systemd[1]: Starting Anbox Container Manager...
aug 10 23:18:44 djhg2000-pinephone modprobe[3445]: modprobe: FATAL: Module ashmem_linux not found in directory /lib/modules/5.7-pinephone
aug 10 23:18:44 djhg2000-pinephone systemd[1]: anbox-container-manager.service: Control process exited, code=exited, status=1/FAILURE
aug 10 23:18:44 djhg2000-pinephone anbox-bridge.sh[3446]: anbox-bridge isn't running
aug 10 23:18:44 djhg2000-pinephone systemd[1]: anbox-container-manager.service: Control process exited, code=exited, status=1/FAILURE
aug 10 23:18:44 djhg2000-pinephone systemd[1]: anbox-container-manager.service: Failed with result 'exit-code'.
aug 10 23:18:44 djhg2000-pinephone systemd[1]: Failed to start Anbox Container Manager.
Probably related upstream issue: https://github.com/anbox/anbox/issues/1488
Supposedly Arch has patches to work around the issue since their Wiki recommends running Anbox without the DKMS modules on kernel 5.7+: https://wiki.archlinux.org/index.php/Anbox