Read More link not showing for excerpts on blog page

I have searched and do not understand the solutions found for resolving this.

The url is https://selllikeitmatters.com/blog/

The excerpts do not include the ‘Read More’ link.

I am very familiar with CSS and HTML but not php. Given clear instruction, I can do what needs to be done, but I am a beginner when it comes to php.

Any assistance would be appreciated.