Ordered List – Numbers not showing up in the content

When I have a list typed up and click on the icon for ‘ordered list’ to have numbers by each line, the number shows up and looks great in the draft, but when I go and preview or publish the post and view the post on the website, the number does not show up. Do you know what I could be doing wrong? Do I need to add something to CSS script that I might have accidentally deleted? The website is https://www.cochlearimplantonline.com.

Thank you!