Is website's theme a major factor is the theme of a site?

hi!

recently, i have been using an app for image optimization to improve my site’s speed. The app has reduced image size by 400 MB while simultaneously implementing lazy loading, pre asset loading, etc.

BUT apart from this, my site’s speed is the same.

the support says the following:

what should I do? Should I change the theme

here is a link of pagespeed insights reports:

https://pagespeed.web.dev/analysis/https-planetjunior-pk/6rd0eg6vix?form_factor=mobile

Dear,

Dom size can be a complex issue, but more often than not reducing, compressing, minifying and combining JS/CSS can be the biggest culprit.

If you need assistance with this, and in general getting your store much faster, feel free to reach out.

I have a skilled team of SEO specialists based in Asia.

Niels
SilverLine Studio
SEO Agency