Lenovo x280 FHD non touch. with full brightness as to avoid PWM. No symptoms for 2 years, though I've tested some 15 laptops and phones during the past few years.
Motorola g100 brightness over 65% is also problem free.
Amazing that we cannot figure out what it is that is missing from the above devices that causes them not to cause any eye strain.
And amazing that among the manufacturers there are no people like us.
Yesterday I used my work Lenovo Yoga X1 5gen and my eyes were bloodshot within hours use and remained irritated the rest of the day.