Hi @startechmarketing ,
Hope you are doing well.
Actually, you can edit our docs of the BetterDocs using Gutenberg editor which is a default editor of WordPress. And whenever you edit any doc, it gets opened in Gutenberg editor automatically. However, as you are not getting the Gutenberg editor, then it seems that you are using Classic editor or any other editor, so the doc is getting opened via that editor.
If that is so, then you need to go to the Writing setting. Please navigate to WP Admin Dashboard > Settings > Writing > Default editor for all users > select Block Editor > Save Changes.
Please check this screencast that I created for you to show the detail: https://d.pr/v/6eKyLa
I hope this will help you. Let me know how it goes.
Thank you.