I think these two are the most popular.

https://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html

https://bombich.com/

Really easy.

It can.
There are several posts like this. I am curious why people want a laptop. Editing is generally time consuming and better on a large screen.
Why wouldn’t a Mac Studio or even high spec mini be better connected to a 30” screen?

It must be a pain on a small screen?

The people in the shops seem to use Whoosh.

https://whoosh.com/