Compare Link Conditional Statement

I would like to be able to show a link to the compare page within the header of my site, but only when products have been added to the compare list. Something like:

if ( has_comparison( ) { echo '<a href="link-to-compare-page">Compare</a>'; }

Is there any kind of conditional statement I can use to check for comparisons and then present a link?

https://ww.wp.xz.cn/plugins/yith-woocommerce-compare/