Running VirtualBox on Armbian is generally not a good fit for what you’re trying to do. Armbian is primarily designed for ARM-based single-board computers, and VirtualBox is built with x86 hosts in mind and relies on kernel modules that are not well-supported (or sometimes not available at all) on ARM kernels like the one in your chosen Armbian image. Even if you manage to install the package, it’s very likely you’ll run into missing kernel module issues or lack of hardware virtualization support, especially on boards like the Orange Pi 5 Plus.
If your goal is to run Home Assistant without containers, a more reliable approach would be to either run Home Assistant OS directly on supported hardware, or use a lightweight hypervisor that works well on ARM (such as KVM/QEMU, if your board and kernel support it). Alternatively, if you specifically want VirtualBox, you’ll have a much smoother experience running it on a standard x86 Debian/Ubuntu system rather than Armbian.