Hello and welcome to the forum 🙂
twright5113 only want users with 'admin' permissions on the projects application to be able to change the state of the project
REI3 apps usually have some configuration options, though in this case I think there is no option to change this particular behaviour.
twright5113 Is this possible to change in builder mode?
Making changes to other apps directly is a no-go (docs). and is not update-safe - the Builder is there to either build your own apps or to build on top of other apps to add more features.
If you need changes to or want features implemented into the REI3 apps from the repository, you can contact us and we can make an estimate. Since REI3 is a low code platform, we can usually implement new features/options within a few hours.
Building your own projects app is also an option if you have more specific requirements.