You will need to check with your developer who built the website to sort this out. Collaborate and rearrange sections, basically, you need to optimize them well to make them load faster. According to Google, landing page experience is determined according to the following things:

Fast website and page loading time
Relevance and usefulness of page content
Trustworthiness of page content through transparency
When a landing page is irrelevant or slow to load, viewers will leave at higher rates. This tells Google that the landing page is poorly constructed, which results in a negative Ad Rank.
Ease of navigation via mobile and desktop

Reinventing your landing page into an Accelerated Mobile Page (AMP) can help speed up your loading time and gives visitors/users a better experience.

When pages show quick load times and high levels of relevance, though, they’re likely to earn a higher Quality Score. This, as a result, creates a higher Ad Rank over time.

Best of luck!