Great set of suggestions.
I experience a fair amount of over lighting on some calls due to my monitor (a 42" Dell thing, maybe sitting 50-60cm away). Most things I use have dark mode, but when someone shares their screen and it's pure white I end up looking like an apparition. Does anyone have any additional suggestions where the monitor itself is the cause of the excess light? Is distance a helping factor (someone else mentioned 1.5m away from their 85" TV)?