If you are wanting to display the same slider that’s on the homepage across all the pages / posts on your site then navigate to the Appearance > Customize > Slider.
In the Default Slider options you will see 2 checkboxes – “Display the slider on all pages” and “Display the slider on the blog posts”. If you select those your slider will appear on every page / post of the site.
Alternatively if you wish to display a different slider on every page of the site there is a “Slider Shortcode” field on all pages and posts. This will require installing a slider plugin such as Meta Slider.
Then you can create various sliders and paste the shortcode for each one into the Slider Shortcode field of the page or post you wish to display it on.