Pi 5 and touch display 2 not working together

Hello everyone, I am pretty new to Linux/dietpi. I juse bought myself a pi 5 and touch display 2 for a digital dash project. When I load up dietpi connected to my display I see the boot up lines appear but as soon as the actual os loads the screen goes black (the backlight stays on).

I feel like I have tried everything suggested in previous forum posts plus some. I have tried adding the following lines to the config file:

dtoverlay=vc4-kms-dsi-ili9881-7inch,noaudio,rotation=270
display_auto_detect=1
disable_fw_kms_setup=1

I have also tried commenting out anything that might favor hdmi inputs over the screen, and I even tried deleting the video=HDMI line in the cmdline. I even tried to change the dtoverlay to the fkms version. None of this has made a bit of difference, I’m hoping its something stupid that I’m missing because I’m new to all this. TIA

Hmm the waveshare wiki says you need both lines

dtoverlay=vc4-kms-v3d 
#For DSI1 usage 
dtoverlay=vc4-kms-dsi-ili9881-7inch

https://www.waveshare.com/wiki/Raspberry_Pi_Touch_Display_2