I had the same problem after approx 18 months of usage, screen burnt in and was getting hard to read out with white/light backgrounds. Like some other contributors, I do not use a lot the screen during my activities (screen off 95% of the time).
Suunto reparied/replaced the screen during warranty end of 2022.
However, the screen has again burnt in and again the watch starts to be quite unusefull… i think it’s more of a design problem and the choice of this amoled screen seems not to correspond to the high Suunto standards…(I own also a Suunto Core from the nineties…yes last millenium, which still operates perfectly).
I’m thinking chaning the watch, still I lost some confidence in Suunto flawless quality, and have some doubts on amoled technology.