Shot and tweaked on a Pixel 6 Pro at 4x (nominally around 100mm, but in macro situations it actually upscales from the main 24mm equivalent lens, not the 103mm periscope telephoto)
Yes, that's literally true (or was before the Russian army visited). The ambient radiation in the Chernobyl Exclusion Zone, which is all you'd see on a map, is only slightly elevated. The main risk there is of disturbing the ground or abandoned debris and exposing much more dangerous material buried just below the surface.
Topaz does a really nice job on the noise, and it's very noticeable in the fur.
I'd like to see the whole image be quite a bit brighter, personally. It's really hard to see the detail in this.