Well, this blog post convinced me that upgrading from bullseye to bookworm didn't have to be nearly as complex as the official Debian documentation made it out to be, so I followed those instructions and completed without error. Initially, I neglected to edit /etc/apt/sources.list.d/armbian.list before executing full-upgrade, but it seems to have worked as a two-step full-upgrade.
Welcome to Armbian 23.8.3 Bookworm with Linux 6.1.53-current-sunxi
and xradio wifi is working 😀
mc510's post in armbian-bsp-cli-orangepizero kept back, unmet dependencies, you have held broken packages ... ? was marked as the answer