How to change Raspberry Pi screen resolution in headless mode

My Raspberry Pi screen resolution being stuck at 800×600 with VNC access to a headless Raspberry PI with Raspberry Pi OS. I found that if I comment out the lines towards the end (as shown below) I was able to achieve a 1920×1080 resolution with my remote headless connection.

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d
#max_framebuffers=2

[all]
#dtoverlay=vc4-fkms-v3d

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