Yeah! From a technical perspective, it's relatively trivial. However, I'm not aware of this feature existing in any emulators.

(But it's been years since I really looked into it)

The crt filters are pretty terrible though. None of the good aspects, just raster lines amd saturated colors it seems.

There are some good ones! CRT Royale is pretty decent!

I agree with you: most of them get it badly wrong.