Hello,
Please provide us your site URL with specific screenshots about your query clearly so that we can inspect in detal and provide you with the precise fix.
Also make sure you make customization in the child theme. If you make changes in the parent theme then you will loose the changes you made while updating the theme.
Here is the documentation that will help you in creating a child theme.
wptravel.io/how-to-create-a-child-theme
Thank you.