Rotate display 90 degrees ?

Hi, I have installed hifiberryos on a raspberry pi 4.
-Digi2 Pro
-System software 20230404
I have a disply 480x1920 connected and would like to rotate the display 90 degrees. I have tried to "display_lcd_rotate=1
" in config.txt, but it didn't work. Is there a way to solve this without buying a new display or rotate it pdysically :-)