Where are you seeing a rel= pagination tag? I'm just curious because a typical page link that I see is a link like any other: https://example.com/page/2/ but I would not want that indexed because it would be an archive page.

In general you want to be careful of indexing archives or site-search results pages pages because they are duplicated with their own page or post address/URL. WP is great for making things easy to find, but you don't want to try to index the same content in multiple ways.

there is an issue with pagination the link is in <link rel =url> as Screaming frog

issue type: pagination url is not in anchor tag

recommended solution to this issue as screaming frog says
ensure paginated URLs are linked within <a> tags
this will allow them to be crawled and indexed, and pass PageRank onto any URLs they link to.

i need to change to anchor tag which is <a> tag

in wordpress

Where are you adding these links? WP normally handles pagination URLs in their own settings, automatically. You may possibly find a place in your functions.php file, not necessarily.