To enable this feature, click on the Page icon button in the top left header of the plugin, then click the Enable Auto Slide Numbers to add the Figma component, which you can customize, and the instances of the component will be added to your slides automatically.

You can also change the color scheme; by default, the Auto Text Layer option is selected, where the text color will automatically be determined based on each frame's solid background fill in Figma.

Changing the position of the page numbers can be updated by changing the Vertical (Top/Center/Bottom) and Horizontal (Left/Center/Right) select box options.