Custom Elements for Blog?

Hi,

I was hoping to include mathematical equations in my Wix blog posts.

I am new to Velo, but I noticed that react-katex was an available npm package on Velo so I had the idea to create a custom “Equation” element that used react-katex. I created the sample “HelloWorld” custom element and am able to add it to a page on my website, but I could not find any way to add a custom element to a blog post.

Is that possible?

Does anyone have suggestions for including mathematical equations in a Wix blog post?

Thank you,
Eric