Perhaps this question you should continue to ask ASRock
This is the problem of ASRock's BIOS.
Should be given a solution by them
Sorry, I don't have the same configuration and can't test it.
Thanks for the reply.
I did ask them and they say that PBO is available with Pinnacle Ridge "X" CPUs, but unfortunately not with "non-X" CPUs...
I am wondering if this is an AMD issue or not and if it will be available with an chipset in the future update in the future, or a BIOS update by ASRock...
Pinnacle Ridge Ryzen CPU without X, such as your Ryzen 5 2600, still has features like XFR or PBO
But in fact, I don't recommend overclocking the Ryzen 2 generation CPU based on Pinnacle Ridge.
For example, if your Ryzen 5 2600, if you don't overclock, rely on PBO and XFR2, your maximum frequency is 3.9 GHz. If you overclock the all cores to 3.9 GHz, it will cause a big increase in power consumption.
If you don't overclock to 3.9 GHz, your single-threaded performance/single core performance will suffer
Maybe you should go to the ASRock community and ask if there is a better solution.
Of course, based on what I said before, you can still have a good experience without overclocking.