Need some Wordpress optimisations and improve Mobile speed

A WordPress site and current apps needs optimisation to enhance the user experience and reduce mobile loading times. The site currently scores 99 for desktop speed but 84 for mobile in Google tests. Issues include a slow loading times above 1.9 seconds on mobile and layout shifts as elements load. The candidate should optimise site resources by reducing unused CSS, improving image delivery, and eliminating reflows and long tasks. Caching, lazy loading, and minimising the dependency tree can help.

Most important is: Optimising the LCP, FID, and CLS scores is critical to resolving Google's experience concerns and speed up the mobile user flow to under 1.9 sec. WordPress plugins may be causing bloat and need assessment for removal or modification. Speed and usability improvements are required to resolve performance issues penalising the site.