Making a script, that scans for Dex Explorer is Insanely Hard, yes that’s right. Since Dex’s parent is CoreGui, that’s the problem. CoreGui is inaccessible, because it contains the main code to keep the game running, And Dex also can change names into randomly generated characters, such as: 9K84FC7854DH967h&*#R658ZR53. But you still can make a script that scans for One of the Variables that Dex uses, Such as: ScriptEditor. Overall, making Anti-Dex is almost impossible. It also depends on the Executor, whether the exploiter has a De-Compiler or not.
No, I don’t believe you can make a check for ScriptEditor as its parent is in CoreGui. Although there are hacky ways to access CoreGui, it’s quite challenging.