at the last firmwares did not have this option
my router by command
wl country
US (Q2/992) UNITED STATES
nvram show | grep -E 'ccode|regrev|regulation|wl[0-9]_country|wl[0-9]_reg_mode' | sort
0:ccode=Q2
0:regrev=992
1:ccode=Q2
1:regrev=992
wl0_country_code=Q2
wl0_country_rev=992...
I have already installed this firmware, I noticed one bug
download and upload speed by cable decreased twice I have a Gigabit connection
back on the 3.0.0.4.380.1354 after reset, everything fell back to normal