I am trying to make an app without the rectangular border/window entirely, just the view component is visible.

Like Grammarly, its a button floating beside any textfield on my Mac

So far I have done:

• set the app as an agent in info list (removed the app from dock)
• hide the title bar

Desperately need help.

Without a window, your macOS app will not have a user interface for interaction. It will rely on programmatic implementation or integration with other applications to provide functionality.