As they say, did you turn it off and on... he he
Reboot helped, although I had only 8 days of uptime and in the meantime something caused some confusion.
I speculate that it may be something related to cpu tool deprecated... or
root@odroidxu4:~# apt list --upgradable
Listing... Done
armbian-bsp-cli-odroidxu4-current/bullseye 24.5.1 armhf [upgradable from: 23.8.1]
N: There is 1 additional version. Please use the '-a' switch to see it
However, using cpupower I was able to set 1.9 and 1.3Ghz, but setting it to 2.0 and 1.4 does not work even though cpupower provides such an option.
I'm guessing it may be something deeper in the kernel set for this sbc?