Yes, 6m is too high for 2.8mm lens, better lower it or use motorized lens.
Fixed lens with dual illumination.
https://empiretech01.com/products/empiretech-ipc-t54pro-as-1-1-8-cmos-4mp-wizcolor-fixed-focal-two-way-talk-turret-network-camera?_pos=1&_psq=ipc-t54pro-as&_ss=e&_v=1.0
Motorized lens...