I am unable to locate from where the logo on homepage needs to be changed

Hello, @Abhishek Shetty,

Thank you so much for purchasing our theme and contacting our support center.

1. Maybe a custom header is used, and you need to edit it too. Go to Theme Options > Header Builder > Multiple headers > edit custom header for the Front page.

If you are unable to observe any modifications in the header on the homepage, we kindly request you to refer to and adhere to the guidelines provided in our theme documentation.
https://www.8theme.com/documentation/xstore/woocommerce/product-images/

We trust that this will resolve your concern.

2. The child theme is a theme that inherits the functionality of the parent theme and allows you to make modifications or add additional functionality to the parent theme. If you have made all your changes/modifications in the Child Theme, then you can use the Child Theme on your site.

For further information, please read these articles: https://www.wpbeginner.com/glossary/child-theme/ & https://www.hostitsmart.com/blog/difference-between-parent-theme-child-theme-in-wordpress/

Best Regards,
8Theme’s Team.