As you have guessed, I find this hard to believe, indeed. @tdm once argued that the green tint problem was likely related to lack of stringent screen calibration, something supposed to be near-unaffordable for small-series manufacturers, so that it is essentially a matter of luck, whether you get a green-tint screen or now ...
Are you able to point out the LineageOS patch that you think did this magic for you? If it exists, I would love to backport that fix to my LOS 16.0.
However, I'm not able to find anything that seems related, neither in the pro1-specific LOS 17.1, nor the LOS 18