The demo serves to demonstrate what the theme can do for you, to check the size of the files and much more, that is, to show you what you will really achieve using all the features it offers, and it is also clear to know the to expect visually from the theme you are purchasing.
If even the developer can’t optimize the theme itself, then it’s one more task for the user to get by, which in your case and in my opinion, was just getting rid of everything and having just text and an image practically for each post, which for me and in my tests, is meaningless, I need to use the theme with many images and almost as it is in the demo.
About LCP, it depends on where the images are and on what devices you are viewing that moment, not forgetting that earlier this year Google made changes in this metric with Chrome 88, more at https://web.dev/lcp/ e at https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/speed/metrics_changelog/2020_11_lcp.md
But what I mean is for developers to improve the theme and be able to make the demos themselves get good scores.
In your case, I still give you some advice, if there is something unique that the theme has and no other can offer, in your case, there are lighter themes (total of 500kb with many images, with one image it is 250kb or less) and with similar features, that without CDN you’ll get a better score than your current one, something I can also get with these other themes and only using the server and free plug-in.
What I’m saying is that Google only asked to improve LCP and CLS over a year ago, and so far it hasn’t been done by the developers.
Finally, I have to praise the latest updates, especially 11.2, which brought better performance and less use of server resources, now the theme is really working as it should (now it looks like it’s really compatible with WordPress, without slowing anything down ), all that remains is to improve the LCP to get a good score.

Yes, now I’m seeing a good score, but it has made changes since the last test, the search bar isn’t even working properly (it used to be working) and the home page now has a score of only 42 points (previously it was 75), but the site in question is not a typical use (it has almost one image per page, nor does it have any image in the logo) and it is beside the point.
I’ll be very direct for you and everyone to understand, you say that it’s possible to have a good score and all that, but not even your own theme and demo show what you say, I mean that you sell a theme that doesn’t have a demo that pass the Core Web Vital test, meaning you can’t even score your demos yourself, but you want to require users to stop using some features in order to score well.
If you say that your theme gets a good score and passes the Core Web Vital tests, show a demo that has that excellent score and show how you achieved this feat.
I’m not complaining about my site or other people’s sites, but about their own demos, which don’t have a good score, which already hinders whoever uses it.
Have you ever thought about buying a car and it is written that it reaches 100hm/h and discover that it only arrives at this speed if you remove whites, and other items to be lighter? Does not make any sense.
In summary, what I mean is… stop blaming the site’s poor performance to your consumers, make your demos perform well and pass Core Web Vital tests, oh yes, demand that buyers have to make adjustments to have a similar performance, but at the moment, what you are doing is the opposite, presenting a performance that does not pass the Core Web Vital and requires the consumer to solve these problems.

That’s the problem, if you want to make the site the same as yours, with practically one image per post, I can also get that score.
The problem is when a post has many images, which is pretty much what most sites have (and the demo too), an example is your own site, look at the score it gets on the main page for having many images (this because it still uses the mobile theme and has lazyload enabled, the rocket plugin and CDN, responsive should get even worse this score), if your posts had more images, your site wouldn’t even have half of what it takes to have a decent LCP.
If you’re buying a theme and you can’t even use the demo with a good performance, it’s at least strange to continue betting on the theme, since I work with other themes and they with many images score more than enough to pass these tests of the Core Web Vitals.
for reference, look at the score on your homepage and another post with two images https://imgur.com/a/iwtqofJ

• This reply was modified 4 years by kitojardimelba.

I also wanted the posts on the homepage, in categories and tags in theme mobile, to also be shown in the order they are modified.
Thank you for your help.

Hi, nothing has changed.
I copied the content folder to another place, deleted all the contents of the website folder (including the folder itself), installed wordpress again, pasted the content folder again and the theme still doesn’t work.
just install, you don’t even need to activate the tagDiv Composer plugin the error appears, then when you activate the plugin, it still changes the wp-config permission, leaving 600, then only the site works, but the admin panel I can’t enter.