I just now noticed something in the description of the “Efficiency” performance profile of the power saver settings. You can read about it here (because German locale on my phone).
The “Efficiency” profile is described as
“Favor power savings. Limit maximum CPU power and optimize for power saving at the cost of higher latency.”
If Kernel Adiutor doesn’t work, perhaps that setting could do something helpful?
I did set it when I installed LineageOS because it seemed to be the reasonable choice for me, but I totally forgot about the CPU limiting part …