When creating a quote for a lead or customer, it will automatically appear in the Quotes list in the pipeline screen.
You can track all your quotes in the Quotes list, view the total amount, and track if it was already sent to your lead/customer or if it is still in draft.
When your customers approve your quote, you can easily move it in the pipeline to the relevant status, using the Move To button.
To view all quotes of a customers, tap on the customer, and scroll to the Quotes section.