You can try achieving this by using the custom child theme of Sparkling theme shared in the following topic that contains some custom code.
https://colorlibsupport.com/t/remove-theme-by-colorlib-powered-by-wordpress/
You can try achieving this by using the custom child theme of Sparkling theme shared in the following topic that contains some custom code.
https://colorlibsupport.com/t/remove-theme-by-colorlib-powered-by-wordpress/