Hi, thank you for your query. The theme you are using has a special feature for footer. It is not available under Appearance > Widgets. In your WordPress dashboard, you will find a menu named Footers which is between OPAL FAQs and Links menu. When you select the menu, you will find your custom footer here. Click ‘Edit’ button and the content of footer area will appear like a post. If you hover your cursor over any of the sections, you will find ‘Edit’, ‘Clone’ and ‘Delete’ button for each section. Click on ‘Edit’ button and make necessary changes. If you are not familiar with Visual Editor, please click on ‘Classic Mode’ and find the text you are looking to replace.
If you are still confused, please send us an email at email@example.com specifying your requirements.