Not sure if they are available by ectool but they definitely are via the ccd, both were included when I said I did not found any obvious limits.
Also cpupower is kinda lying, it can only change spl, fppt and sppt, p3t is unshakeable XD. It also has a few more features not included in the help text like switching between the profiles in “update_os_power_slider” and some others I don’t quite understand (it can also crash the ec if it doesn’t like the params it gets XD).
I kinda gave up on this for now and just made sure the P3T is at least 89W. Not wo get onto more usefull ec changes like making making the power button less bright and more sensible keyboard backlight levels XD.