Hide Next/Previous Post Links when only one post, and using loop

I’m using Next/Previous Post Links Plus with ‘loop’ set to ‘true’ and ‘return’ set to ‘href’ because I want to append GET information to the end of the links for the next pages.
I am filtering by excluding a set of categories, with ‘ex_cats_method’ set to ‘diff’.

If I have only one post in a category, I want to hide the links, how would I get about doing that?
(this works ‘natively’ if ‘return’ is set to ” . But I want to keep it with ‘href’. Unless there is another way of appending info to the end of the links in another way?

Thanks for a great plugin!

https://ww.wp.xz.cn/plugins/ambrosite-nextprevious-post-link-plus/