I'm looking at the first TIFF:
https://visions4netjournal.com/wp-co...C19D32BC1.tiff
I am puzzled because I can see the phosphor dots plainly in areas with one dominant color, but not in neutral areas. The blue stripes on the dress show prominent dots, but the white stripes and white collar don't.
I have a hypothesis of why:
The 15GP22 has 195,000 triads and 88.5 square inches of screen giving 2203 triads per square inch or 46.9 triads per linear inch. Screen width is 11.5 inches, giving 539 triads per width.
The CRT image does not fill the 6000x4000 pixel image from your camera, but only about 2834x2130 pixels.
So, ratio of pixels to triads is 5.24:1. It takes at least 2 pixels to describe a bright phosphor dot and a black space, so this brings the ratio down to 2.6:1.
This should still work, and it apparently does.
Now note that the red and green dots are spaced twice as close, or 1.3:1, or inverting the ratio, the spatial frequency is 76% of the Nyquist rate. This should still be workable if your camera sensed all three colors in every pixel, but it doesn't. It has a RGB color filter pattern and a spatial low pass filter, and there is antialiasing processing in the raw conversion, to suppress color moire' patterns on such fine details.
There may also be effects of in-camera noise reduction if you are shooting at high ISO.
The bottom line: if you zoom in to fill the camera frame with the CRT image, you may be able to resolve the phosphor dots everywhere including areas where all three primary colors are lit.