A BIG thanks for that. I have a bhyve windows 10 that I use when needed for work. I need it very infrequently, so didn't even know there was an issue until I saw this thread. I then started my bhyve in Windows and found it wouldn't start. Added the "-A" option to the config (I use vm-bhyve) and all was good. Thanks.
I have a few RHEL9 machines that also use uefi. I only tested one, but sure enough, it wouldn't start till I added that "-A" option. You saved me a lot web searching