Please use the suggestions here: https://www.debugpoint.com/2019/12/how-to-rotate-display-in-ubuntu-linux/
This thread also has additional suggestions: Upside-down desktop orientation after fresh install
Please use the suggestions here: https://www.debugpoint.com/2019/12/how-to-rotate-display-in-ubuntu-linux/
This thread also has additional suggestions: Upside-down desktop orientation after fresh install