Website is loading slow on mobile

Publishing help SEO
1

Based on https://pagespeed.web.dev/analysis/https-www-elektrolinka-cz/ss03xe5y4i?form_factor= Largest Contentful Paint on mobile is 7,7 seconds, which is really slow. How can improve the score?

Here is my site Read-Only: [LINK]1
(how to share your site Read-Only link)

2

The cookie modal is the issue.
Try to delay it, perhaps using a little bit of JS.