?nowprocket=1 appears in the site’s analytics

The Delay JavaScript execution feature isn’t compatible with Internet Explorer 11. 

If the Delay JavaScript execution feature is active, users of Internet Explorer 11 will be automatically redirected to the non-cached version of a page. That’s handled by WP Rocket by appending "?nowprocket=1" to the URL of the page, e.g. https://www.example.com/?nowprocket=1

If you want the pageviews for such URLs to be counted along with the regular URLs, you’ll need to exclude the "nowprocket" query string from Google Analytics or rewrite them.

You can ask an SEO expert to help you with this or follow the instructions in this article:
https://edit.co.uk/blog/how-to-handle-url-query-parameters-google-analytics/