SCAM stands for (Single Component Angular Module) and the term was coined by Lars Gyrup Brink Nielsen in his article about Tree-Shakable Components https://blog.angularindepth.com/angular-revisited-tree-shakable-components-and-optional-ngmodules-329a4629276d

yarn add @wishtack/schematics 
# or npm install --save @wishtack/schematics

yarn ng generate @wishtack/schematics:scam sandwich/sandwich-preview
# or npx ng generate @wishtack/schematics:scam sandwich/sandwich-preview

This will produce the following file tree.

sandwich/
  sandwich-preview/ 
    sandwich-preview.component.ts
    sandwich-preview.component.css|scss
    sandwich-preview.component.html
    sandwich-preview.component.spec.ts

The Angular Module (NgModule) is declared inside sandwich-preview.component.ts which is the recommended approach. You can read why here https://medium.com/wishtack/your-angular-module-is-a-scam-b4136ca3917b and here https://medium.com/@alx_31836/i-am-a-huge-proponent-of-scam-and-im-definitely-using-that-name-from-now-on-cab2fe98fee3.

If for some reason, you want a separate file for the module, you can use the --separate-module option.