Unless I am missing something on my end, I am not seeing the pagination tags (rel=prev and rel=next) in the source code. Is there any way we can get this added to a future update please: https://developers.google.com/search/blog/2011/09/pagination-with-relnext-and-relprev
I would also say that some people may opt to not use these tags and still prefer to use canonical tags on all paginated pages (that point to page 1). Maybe it’s a setting in WPSolr?