https://wccftech.com/high-power-mode-for-macs-found-in-macos-monterey-beta/

A ‘High Power Mode’ reference was found in the latest developer beta of macOS Monterey, suggesting that Apple could provide a free performance boost for Macs.

With the ‘High Power Mode’ active in macOS Monterey, your Mac could negative its power-efficiency attributes to maximize performance when required. 9to5Mac reports that the mode was added to the eight developer beta, which was released to developers earlier. Since there already is a ‘Low Power Mode,’ it would make complete sense for Apple to add a ‘High Power Mode’ for users that want to prioritize performance over everything else.