Hello

 I tested and found the whole design and layout to be very beautiful.

 Here are my suggestions:

 the "kart" in the "cover purchase page" is not very visible and can be considered an article. Maybe by placing it at the top of the page (like in most marketplaces)

 On the cover list page, there is a warning message that says; 'The coverage amount must be between 0.0001 and 0.1ETH', however, we can enter an amount greater than 0.1 ETH. Maybe block the entrance at the higher value or raise a red message or warning in the entrance. If we don't see the message below, we can waste time entering the amounts (imagine you have 20 covers in the list)

 We need all the digits in the ETH balance, maybe only 5 or 6 digits will be enough after how

 After choosing more than 10 covers, on the checkout page, we have a scroll bar, this is not good for the layout. Could you arrange the widgets and the page so that you have the entire list of items under your eyes?

 On the page with the list of protocols we should be able to deselect all the selected items, could you add a reset button or uncheck the checkbox?