Hi,

Here is 2 the points caused your site loading slow:

1/ The main things is your category mega menu - you're using too many categories mega menu with child items - check this image for example: http://prntscr.com/uon64i

Let's try to calculate: You have more than 20 child categories on this category mega menu - and one child category mega menu loads 12 images => total only this menu item loads:  20x12 = 240 images.

That is, I have not yet calculated your other menu items.

Do you think: have any WordPress theme can loads good when loads too many images like that? I think at least your site loads more than 500+ images on your homepage. It's a huge resource.

So, the first think, I recommend you use normal sub-menu for categories mega menu has too many child menu items to reduce images need to loads for your homepage.

2/ You can use plugin: https://wordpress.org/plugins/litespeed-cache/ to create a caching for your site and optimize other things. See more on this guide:

https://blog.litespeedtech.com/2020/06/10/wpw-the-beginners-guide-to-litespeed-cache-for-wordpress/

Best Regards,

PenciDesign