What you should avoid doing is assume the two elements it lists under LCP are the actual problem. They are simply the largest ( in pixels ) sized elements that google assumes is your main content.
You need to look at:
1. Is there anything related to those elements that is causing a delay – such as a Large image, or a slow loading font.
2. What is effecting the overall load time of your site.
On your site the difference between FCP and LCP are fairly small. But you have a slow FCP time, which means the issues are more likely related to server response times and their being a large amount of requests. Improve those to improve your LCP and any other metric