Hello @dougveltingjr
Thank you for contacting us, When you enable mobile redirection of the AMP plugin, it will detect mobile devices using a javascript code and redirect your site from the non-AMP version to the AMP version for a better mobile experience.
The Pagespeed just acknowledges that and asks you to use directly AMP URL to measure AMP page performance.
You can copy that URL and test for the page speed of the AMP page by adding a direct URL you will remove the redundant calculation of redirection time.t
There is nothing to worry about it.
If you don’t want to redirect the AMP page to a mobile then you can keep it disabled as the AMP page will be served from the AMP cache on SERP for mobile devices.
We hope this helps!
@dougveltingjr As we didn’t receive a response I’ll mark this as resolved. Feel free to open a new support topic if you require any further assistance.