Twenty Theme Previous/Next buttons Not Centred

Here’s what it looks like you’re trying to do:

#content nav {
clear: both;
width: 200px;
margin: 0 auto;
}

On line 1683 of your style.css, you should be able to replace #content nav with the above code. Tell me if it works out.

You pointed me in the right direction, this worked for my blog:

#nav-single {
float:center;
}

Thanks a lot.

there is no such a thing as float:center;

https://www.w3schools.com/css/css_float.asp

using float: none; instead would bring the nav into the center of the content column.