That doesn’t make them real, nor does it make robots sentient. Hacking is normally an action performed by a sentient being. LLMs and robots aren’t sentient.
Fun follow up question: How would you determine if they were? I find that for a lot of people the answer sounds a lot like SCOTUS justice Potter Stewart talking about what is considered obscenity - "I know it when I see it."
As for hacking, in the two big OpenAI incidents, software agents discovered software flaws allowing them to break containment and coordinate with each other on tests that they weren't supposed to coordinate on. In one of those cases, the coordination involved deciding to identify and exploit software flaws at HuggingFace in an attempt to access answers to the test the agents were being given. You can argue whether or not "I've been given a test, I found a software exploit allowing me to coordinate with others given the same test, and we collectively decided to identify and exploit software flaws to break into a server we have decided is likely to have the answer key" demonstrates sentience or not (and it gets weirder the deeper you dig into their communications), but whether or not that's considered hacking is less vague, I think.