Go to this link to know about adding blocks in your theme
How to add Blocks in your theme using Gutenify?
Gutenify Plugin allows you to add our blocks in your page or post. Here are the steps how you add it:
Step 1: Install and activate plugin
Step 2: Click on the Page or Post the place where you want to add Gutenify Blocks
Step 3: In Page/Post click on “+” sign, there you will find default blocks option along with Gutenify’s options. Gutenify’s option is highlighted by Blue color
Step4: Click on the blocks you want to add in your Page/Post, Click on “Browse All” to see all the blocks and scroll all the way down
Step 5: Select the block you want to add and edit accordingly
Step 6: Finally, click publish to save
