npx create-mern-ts-next-app app
(Don't mind the crazy name lol [on a side note, I'm only slightly sure it works for everyone XD]). I was kinda bored in robotics class so I just cooked this up today. You can check out the code here:
github.com/KaiPereira/create-mern-app-kaipereira (for the executable) and here for the template: github.com/KaiPereira/template-for-create-mern-app