Hello @bigmoxy
Thank you for reaching out and I am happy to help!
This depends on the GPS report and what Google is suggesting that needs to be improved when it comes to Mobile score. Please note that the mobile score is measured differently, and it does not take into consideration the actual performance of the website.
However, some websites are built only for desktops and rely on the theme responsiveness to show the user the mobile version, however in this case, some aspects of the website are impacting the mobile score, and in most cases, it’s the LCP.
Without knowing the website URL or checking the report, I cannot give you a precise answer on what needs to be done specificaly.
Thanks!