UI/UX arduino on touchscreen

Goodmorning,

I would need to manage my arduino via a graphical interface, whit sensors status, manager menu, on a color touchscreen display.
I have noticed that many 3D printers have one.
Are they external displays with dedicated chips to be programmed separately or are they managed directly by the microcontroller?

Thanks

External displays with dedicated chips managed by Arduino

May you make me an example please?

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