How to make a multi-window or multi-tab application like browsers? [PyQt6]

I want to make a multi-window or multi-tab application that has the capability of:

• generating new tabs
• dock tabs in a window next to each other
• undock tabs into separate windows

something like browsers that allow us to see different tabs in a window or different windows.I saw Qt has a QTabWidget but how can I add a button next to the last tab to add new tabs and how can I undock tabs in separate windows by dragging the tab title?

tabs in A browser

I found nothing about it when I searched.

how should I do that?