I second your proposal.
My own interest in an ARM port is driven by the (Arm powered) MNT Reform laptop, see thread . My aspiration is to run Haiku in a Virtual Machine atop Sculpt (Genode) so your proposed VM port would be ideal.
Stop Press: MNT launched a processor module for the Reform based on the same RK3588 chip as your Orange Pi. So if you do get Haiku running on bare metal on your SBC, I know a lovely laptop that is ready for it!