An update has been pushed to Raspberry Pi OS to flip the screen for a better desktop viewing angle. This makes it upside-down in most stands/frames/cases, so you'll need to change a setting to flip it back.
Open the config.txt file by using the following command in a terminal window:
sudo nano /boot/config.txt
Then add the line:
lcd_rotate=2
This will rotate both the LCD and the touch coordinates back to the right rotation.
Don't use the documented display_rotate, it performs a performance expensive rotation of the screen and does not rotate the touch input.