Pagespeed insight Perfomance Low Score


I am currently building a website and I have a problem with Pagespped Insight, I have a low performance score. I looked at all the items in detail and corrected a lot of things, but my score did not increase at all.
Also, all other things have been done, including optimization of images, an exemplary structure of the site and other things have been done. Does anyone have any other suggestions on what to do to fix it?

Here is my site Read-Only: LINK

@Boris_Kolasinac - Have you done a comprehensive search in the forums? I have replied to many questions regarding this very topic and provided sound guidance on the subject. I provide professional evaluations with recommendations and actionable items if you are interested.