x86info works.
From what what I can see, the info should be present in the boot logs (although not dmesg), so either check the system log right after booting or watch the console.
I think but am not sure this is the relevant microcode patch on my system. It has high up time so I have no access to the console boot log, and also no hdmi cable available to plugin to my unit right now to check the console locally.
# ls -l /usr/local/share/cpucontrol/06-be-00.11
-rw-r--r-- 1 root wheel 136192 Nov 29 2023 /usr/local/share/cpucontrol/06-be-00.11
It wont be the latest unless you move to a snapshots build.
The commands below.
'fetch -v
https://pkg.freebsd.org/FreeBSD:14:amd64/latest/All/x86info-1.31.s03_1.pkg''pkg install x86info-1.31.s03_1.pkg'
select yes on the prompt which includes fetching some dependencies from pfSense repo.
'x86info -a | grep "Microcode version"'
This shows I am on version 011.