I accomplished this by adding this for the CSS
.wp-pagenavi {display: flex;}
.wp-pagenavi a.nextpostslink {order:1;}
.wp-pagenavi a.previouspostslink {order:-1;}
Keep in mind though, that this will affect the way the page numbers display at mobile, so just double check the way it looks at all sizes. CSS Flex-box can be amazing, and frustrating. 🙂
Was there a solution to this? I’m also needing the signature block and it appears this plugin has a conflict with it.