Facing Core Web Vitals issue.

Hi everyone, my website was going pretty well and I could feel like its getting even better after every update. But suddenly, I LCP scores increased, although my pages were already in "Need Improvement" category but then Google put them in "Poor" category.

I fixed the issues and then my LCP went to around 1.5s but Google again put my urls into "Need Improvement" category instead of "Good".

Another strange thing I have noticed is that, in the Desktop section of Core Web Vital in Google Search Console there is not url. Not in "Poor", "Need Improvement" nor in "Good" category. Its been more than a month, I lost my traffic by almost 90% and its not getting back.

Any assistance would be highly appreciated!