Got it figured out. It seems like the combination of all of these settings in the /boot/config.txt
file are important:
start_x=1
camera_auto_detect=0
dtoverlay=imx708
dtoverlay=vc4-kms-v3d
up until this point, I’ve had each of those set, but not all at the same time. It seems like they all must be set this way to work.
Thanks for your help @Jappe!