While you are designing and editing your website pages on wordpress with Divi Builder, you need to optimise the web page designs for the mobile device.
You will find the option to switch to the mobile version in the left bottom corner (image 1).
If it's not appearing, you might see a 3 dots button (image 2) at the bottom- centre. click on that, it wil appear.
Whatever changes you do for laptop, you need to fix it for tablet and mobile separately.
