Hey there @NB2018,
I can't help much without looking at the backend but maybe adding the following code to your theme.css file may help
.total-line__name span:before [ content: '?'; height: 5px; width: 5px; border-radius: 50%; background: gray; color: black; }
Hope it helps.
sorry for this issue
also so sorry Shopify checkout page customization allow to only Shopify plus plan do you have this?
This is an accepted solution.
You need to add text to your shipping policy.
Go to Settings > Legal > Shipping policy. Once you add content to this the question mark and pop will automatically appear.