twomee How did you got to a situation to not get any eye strain on windows 11?
I dont really know. huawei d16 also is 2021y model, as your dell 5560, and orient for win10 pre-installed.
Zephyrus g16 2022 12700h + rtx4060/IRIS XE with last win11 - eye-strain. Was not able to run win10 1809 correctly (power plans + battery draw, hotkeys OSD)
Thinkbook 16+ 2024 + intel Arc with last win11 - eye-strain. Was not able to run win10 1809 correctly (power plans + battery draw, hotkeys OSD)
Asus gl702vm 2017 + gtx1060 with win10 1809 LTSC - no problems
2 workstations (rtx2070s, rtx3080, 3080ti) with win10 1809 LTSC - no problems until I installed any win10/11 above 2004 with any nvidia drivers (old, newest)