From the official website ( https://pympress.xyz/ ):

Pympress is a little PDF reader written in Python using Poppler for PDF
rendering and GTK+ for the GUI.

It is designed to be a dual-screen reader used for presentations and public
talks, with two displays: the Content window for a projector, and the
Presenter window for your laptop. It is portable and has been tested on
various Mac, Windows and Linux systems.

It comes with many great features:

supports embedded videos
text annotations displayed in the presenter window
natively supports beamer's notes on second screen!

Pympress is a free software, distributed under the terms of the GPL license
(version 2 or, at your option, any later version).