How to create archive post
Add a new Archive Post Template
Go to WordPress admin panel > On dashboard sidebar navigate to Templates > Add new > Select Archive Post type of template > Name your template (optional) > Click on Create Template button.
Design your Archive Post template
You could insert Post Featured Image, Post Title, Post Excerpt widgets and whatever you need for your archive post.
When your Archive Post template is ready you need to attach it to your Blog Archive (step three from How to Create Blog Archive?).