I'm mistaken about which part? Let's start here:

You did not link an example of upscaling, the before and after are the same size.

Unsharp filters enhance false edges on almost all images.

If you claim either one of those are wrong, you're being ridiculous.

I think if you paste our conversation into ChatGPT it can explain the relevant upsampling algorithms. There are algorithms that will artificially enhance edges in a way that can look like "AI", for example everything done on pixel phones prior to ~2023

And to be clear, everyone including Apple has been doing this since at least 2017

The problem with what Samsung was doing is that it was moon-specific detection and replacement