I added page width: 1024px after that, I am facing the responsive issue.

Site URL: https://cornet-rhombus-b7w7.squarespace.com/

https://cornet-rhombus-b7w7.squarespace.com/  password: maknun

page content is not showing in the mobile version. but desktop version is good.

4 minutes ago, maknunhosentpi said:

page content is not showing in the mobile version. but desktop version is good.

It doesn't appear that you've edited the mobile layout. If you edit the page and then toggle the mobile version (top right) you can adjust the block layout independently of the desktop layout. (N.B. you can only adjust the block layout, if you edit the block contents then that will be reflected on both the mobile and desktop.)

I added width 1024px from squarespace style but it`s not working then I added the code and it`s working for desktop and not working for mobile

1 hour ago, maknunhosentpi said:

I added width 1024px from squarespace style but it`s not working then I added the code and it`s working for desktop and not working for mobile

1024px is significantly wider than a mobile screen, so it would cause a significant portion of the page to be hidden on mobile. What's your end goal here?