As per the title, if anyone could shed any light on why only games I have run in Vorpx before are hooking whereas any game untried with Vorpx will no longer hook.
The most likely cause of hooking issues is something on your PC that interfers with vorpX. That might even occur after vorpX updates if for example an overzealous AV program does not like the new vorpX version.
Not really except for a factory reset/full reinstall. Hooking issues are almost always related to something interfering. Please thoroughly go through the guide linked above, even if it worked before.
Note that some third party AV programs are difficult to disable fully. if you use anything else than Windows Defender, get rid of it. Windows Defender kicks in automatically when you remove third party AV programs.