Allowing API keys to access content types from custom plugin

I’ve successfully created some content types in my custom plugin.

However, I cannot find a way to authenticate the generated REST API endpoints via API keys. I was able to add such API keys if the content types are under via /api, but NOT via custom plugin.

Is there a way to add these content types from my custom plugin in my permission settings especially when dealing with API keys or even user roles?

System Information
  • Strapi Version: 4.9.2
  • Operating System: macOS Monterey 12.6.3
  • Database: PostgreSQL 13.10
  • Node Version: 18.15.0
  • NPM Version: 9.5.0
  • Yarn Version: 1.22.19