ashento899
Throughout all of 2023, the Honor 70 Lite was the least problematic handset I've tried, and has provided the most comfort.
It's followed closely by the Honor X8A, however the X8A display has a very high saturation/contrast, so it may not be suitable for everyone.
I've found both of these comfortable when using them at a fixed 60hz refresh rate only.
It must be said that the performance/specs for both of them are trash, but that was something I was willing to overlook for eye comfort.
Other devices that i've found comfortable to use in the past include the older Realme LCD based phones such as the 9 Pro, 7 5G, 8 5G, X50 5G. Everything realme has released after these has been uncomfortable.