Hi @nhs99v,
I hope you are well today and thank you for your question.
To achieve this you have to develop custom code by referring the following topics.
https://colorlibsupport.com/t/changing-the-footer-copyright-message/
https://colorlibsupport.com/t/remove-theme-by-colorlib-powered-by-wordpress/
Best Regards,
Movin