LibreOffice has the same feature. Type Shift+Esc or go to Help > Search Commands to activate the head-up display. You can then search for the command you want.

GIF demo: https://www.omgubuntu.co.uk/2021/08/libreoffice-7-2-release-...

Documentation: https://help.libreoffice.org/latest/en-US/text/shared/option...