Can we stretch the body of the text on a blog post to fit the whole screen?

I feel the same exact way. I left it like that because Google wants it to be 18px for mobile readability. Personally I prefer much smaller text but to keep with the standards left it like that. What is your URL? I can send you code to shrink it to maybe 14px on mobile.

Just saw the URL. You can add this to your additional CSS spot. Be sure to clear your hosting and browser cache after you add it.

@media only screen and (max-width: 600px) {
body,
body > div {
font-size: 1.4rem;
}
}