The doom/heretic wrappers are in another directory. You need to make a custom action file to make it run. There’s a tutorial in the link below, however it’s out of date, given the change in directory structure since it was written.
Probably best to continue any queries there, since it’s a bit off topic.
The image I’ll be putting up soon will have a bunch of action files pre configured, ready to have WAD files injected.