Idk if it's provable how it was recreated but if you type in "XBAND Rough" into the sampler box at the bottom of the page https://www.myfonts.com/collections/ff-confidential-font-fon... and compare to https://fontzone.net/font-details/xband-rough it's exactly the same and the letter splotching is very distinct in the lower case letters.
If I were going to knock it off I'd duplicate the splotching exactly, too. I'd prepare as sample as a bitmap, use any of the various raster-to-vector tracers on it to get an SVG, clean up the SVG of any conversion artifacts, then make it into a type format. (Heck, there's probably a fun problem in here to train an algorithm to do the cleanup and conversion. You could probably knock-off the hinting and ligatures, too.)
"It looks the same" is completely different than having been directly extracted from digital source.
If the digital source is the only thing that can be copyrighted, then you have to prove the digital source is what was used inappropriately. If you can't prove that, either because it didn't happen or because there's no technological way to prove it, then you can't prove copyright infringement.