You *should* be able to adjust the power targets in most newer bios revisions of b450/x470 or newer boards.
To controll Voltage and stepping behavior, maybe look into the "unraid first gen ryzen not boosting" solutions. There where User Scripts templates that you could populate with values specific to your CPU. Values where in HEX and someone made an Excel sheet to find all the right values. It should be googleable, if not - hit me up and I might have some old files on my PC.
Good luck!