Hi,

It seems you're using an old version of Soledad.

If you're using Customizer to config the homepage, you can check option for it via Customize > Featured Slider > General > Display Categories for all Posts on Slider.

If you're using Elementor, this theme already supports an option to help you can allow it - check this image: http://prntscr.com/wlgt5w

Please go and update the theme to latest version 7.6.1 and try it again. You can check this guide to know how to update the theme: https://pencidesign.ticksy.com/article/15633/

Best Regards,

PenciDesign