Hello @ibrahim,

In order to disable the search box in the header use below given CSS.

For this go to Admin Panel > Appearance > Customize > Additional CSS and paste below given CSS.

.header-search-box {
    display: none;
}

Hope this helps.

Best Regards!!

Have a good day .

Hello @ibrahim,

Glad we could help you !!

If you have any issues further, please feel free to post your queries and we will happily help you further.

We will really appreciate if you could help us too by rating our theme in WordPress repo here:-

https://wordpress.org/support/theme/magazine-plus/reviews/

Best regards !!