I visited in Spring 2025. There are extensive renovations going on currently, so I would estimate only around 30% of the site is available to view currently. In addition, the Malatya archeology museum is also closed, so you can't go to see the artifacts that were discovered at Arslantepe. I am not sure when both the museum and the site will be fully open again.
To get to Arslantepe, I used public transportation. Good news -- as of recently, you can tap on with any contactless credit card, so you don't need to buy a pre-paid Malatya card! I used the Moovit app to plan my trip but there may be a better option out there.
When I arrived, I was given the option to use an audio guide, which is available in English, Italian, Turkish, and German. The audio signs were not marked in any clear pattern and I had a hard time knowing when I was supposed to be using it. This might have something to do with so many portions of the site undergoing renovations. There are also signs in Turkish, English, and Italian you can read that explain the history of the site. The rock art was not covered with any curtains while I was there, so it was easy to spot. I was the only person there.
Overall, I can see why the site is important enough to be a WHS. However, the signage was a bit confusing and I couldn't view any of the actual artifacts since the museum in town is closed. The guard told me it has been closed since the February 2023 earthquakes, unfortunately. Hopefully in the future, once renovations have been finished, this site will be a much more educational and interactive experience.