How to change CPU frequency on Ugoos AM6B+?

On Odroid N2 I could change different frequencies for A73 & A53 by entering them in “config.ini”.
On Ugoos AM6B+ it does not work. Whatever frequency I enter in “config.ini” the box always uses default: A73 => 1908 MHz and A53 => 1800 MHz
Is there another way to change CPU frequencies on this box?