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It certainly should be possible but idk if its actually implemented; at the very least you should be able to implement it as a filter plugin for ffmpeg.

Some of the more advanced CRT shaders actually attempt to mathematically model how the video gets distorted by the CRT and even the component video. If the effects of converting to film are so well-understood that Pixar can adapt their film for the process then it out to be able to post-process the video in a way that reproduces those artifacts.

I don't think its possible for it ever to be exactly the same since the display technology of a monitor is fundamentally different from a film projector(or a CRT) but it should be possible to get it good enough that its indistinguishable from an photo of the film being displayed on a modern monitor (ie the colors aren't completely different like in the comparisons in the article.

BTW TFA didn't mention this but about 15 years ago they rerendered toy story and toy story 2 for a new theatrical run when those gimmicky 3d glasses were popular. If that's the version thats being distributed today on Disney plus and bluray (IDK but i feel like it probably is) then that could potentially be a more significant factor in ruining the color balance than not having been converted to film.