Typst Preview
The Typst Preview extension for VS Code provides an excellent slide mode, allowing us to preview and present slides.
Press Ctrl/Cmd + Shift + P
and type Typst Preview: Preview current file in slide mode
to open the preview in slide mode.
Press Ctrl/Cmd + Shift + P
and type Typst Preview: Preview current file in browser and slide mode
to open the slide mode in the browser.
Now, you can press keys like F11
to enter fullscreen mode in the browser, making it suitable for slide presentations.
Since Typst Preview is based on SVG, it can play GIF animations, which is very helpful for dynamic slides.