You can customize the Wrapper of “Post Meta” block using the Combo Blocks plugin. This article will help you to customize the wrapper.
To begin, insert a “Post Meta” block.
Now, insert a Meta field key into the Meta Key Field.
Now click on the Wrapper Tab and change the Wrapper Tag. You can also add a wrapper class.
Now, click on the Styles Tab and add some styles. If you don’t know how to style an element, then read this document.