Hi there,
lets deal with each issue one at a time:
CLS.
See here:
https://www.webpagetest.org/vitals.php?test=230219_AiDcVN_5CA&run=1#cls
When you hover over the image, you will see what is first loaded on your site, which is unstyled HTML, and then the styles load a split second later. You can notice this flash of unstyled content (FOUC) when you first load your site.
This happens because of the Litespeed CSS optimizations you have on your site. It is changing how CSS is loaded, and it is doing a bad job. I would suggest you speak to Litespeed support on how to configure it correctly to stop this from happening.
NOTE:
In any diagnostic tool, that lists Elements under their CLS, those are the elements that have been shifted the most, but they are rarely ever the cause of CLS, unless they happen to be a media element or other javascript interactive and NOT plain HTML as in your last image.