Hi! I would also like assistance with this. I think I figured out how to add the cart number but I was hoping to get some help with having the cart number auto-update without having to refresh the page.
Sorry for facing this issue, it's my pleasure to help us.
Welcome to the Shopify community!
and Thanks for your Good question.
Please share your site URL,
So I will check and provide a solution here.
i will replay on email