I had Bitsum Highest Performance just installed and it then vanished from my power options and never returned after trying to reinstall it.
Most likely your system is stuck using Power Modes instead of Power Plans/Profiles.
Try ParkControl (https://bitsum.com/parkcontrol/) and use menu item "Settings > Experimental > Always Show Bitsum Highest Performance".
Let me know how it goes!
Yeah just popped open ParkControl and it works there. After doing it, I was able to set bitsum highest performance as my performance mode and it seems to be working as intended, even though after closing ParkControl, it doesn't show up in the drop down anymore it does seem to be activiated when performance mode is engaged.