Comment 1 for bug 1776702

There are use cases for qemu-system-arm without that, so it is not a hard depends.
Furthermore - yes it might be a good recommends, if not currently in universe.

That is bug 1570617 and this here effectively is dup of that.
When MIRed this can be resolved.

Until then this is
  https://salsa.debian.org/qemu-team/qemu/commit/ae655ffad917f91332258116dc744ade06103f34
Quoting:
    have qemu-system-arm suggest: qemu-efi; this should be a stronger
    relationship, but qemu-efi is still in universe right now.